Cheap spam scoring, placement tests, and rendering previews in one credit pool
Unspam is an email testing platform that scores a message against spam filters, runs inbox placement tests across Gmail, Outlook, Yahoo, and other providers, renders the same message across fifty-plus real clients and devices in light and dark mode, and produces attention heatmaps; it is a placement and content testing tool and does not warm mailboxes or monitor DMARC reports.
Overview
Unspam sits in the second job of this category: placement and spam testing. It answers the question of where a specific message lands and why, at the moment you ask it, rather than building reputation over time or watching authentication across a domain. You send a test copy to an address it provides, and it reports back a spam score with the reasons behind it, the placement result per provider, and a set of rendering previews showing how the message actually looks to a recipient.
The bundling is what makes it unusual. Most placement testers stop at inbox, promotions, or spam. Unspam pairs the deliverability result with design testing across more than fifty real clients and devices, each rendered in both light and dark mode, and adds heatmaps predicting where attention will fall. For a small marketing team, that collapses two subscriptions into one, because the alternative is a placement tool plus a rendering tool such as Litmus or Email on Acid at several times the combined price.
The pricing is aggressive to the point of being the main argument, though its shape changed during 2026. The fixed Basic, Business, and Agency tiers at $9, $19, and $29 were retired and replaced by a single Custom plan billed per test, at rates the page says fall as volume grows. What survives, and what matters most for a small sender, is the free end: a Free plan giving 21 tests a month with no card, and a no-account tier that runs a handful of tests straight from the page without creating anything. Compared with dedicated placement platforms charging in the hundreds, that is close to free, and it is genuinely enough for a solo sender running one campaign a week.
The caveat that every buyer of a placement tester should internalize applies fully here. Seed testing measures where a copy of your message landed in a panel of test inboxes. It does not measure where your actual recipients received it, because filtering is personalized: engagement history between you and a specific recipient influences placement in ways a seed inbox with no history cannot reproduce. A good result is evidence that nothing is structurally wrong; it is not proof that your list is receiving your mail.
Best for
Small marketing teams, agencies, and solo senders who need pre-send spam scoring, provider-by-provider placement evidence, and cross-client rendering checks in one cheap subscription rather than paying separately for a deliverability tool and a rendering tool.
Not the right fit for
- Anyone who needs sender reputation built rather than measured; Unspam tells you a message looks filterable and does nothing to improve the underlying reputation, which is a warming tool's job.
- Teams that need DMARC aggregate report monitoring; Unspam checks authentication on a per-message basis but does not ingest DMARC reports or track who is sending as your domain.
- Buyers who expect seed results to predict what their actual list experiences; personalized filtering means a clean seed test and a spam-foldered campaign can coexist.
- Cold outbound teams running dozens of mailboxes; the credit model suits campaign senders testing a message, not operators monitoring many sending identities continuously.
- Enterprises needing SSO, audit trails, or contractual data guarantees; the platform is priced and built for small teams, and the top tier is a white-label arrangement rather than an enterprise plan.
How it works
- 1
For a spam test, you send your campaign to an address Unspam generates. It analyzes authentication results, content and HTML structure, link and domain reputation, and blacklist presence, returning a score with itemized reasons rather than a bare number.
- 2
For an inbox placement test, you send the same message to a seed list covering Gmail, Outlook, Yahoo, and other providers. Unspam checks each seed inbox and reports where the copy landed, inbox, a tab such as promotions, or spam, broken out by provider so you can see whether a problem is universal or specific to one mailbox provider.
- 3
For rendering, the same message is displayed across more than fifty real clients and devices including Gmail, Outlook, Apple Mail, iPhone, and Android, each in light and dark mode, which is where most template problems surface. Dark mode in particular breaks logos and background colours in ways nobody catches by eye.
- 4
Heatmaps predict where a reader's attention will land in the layout, which is a design input rather than a deliverability one. All four test types draw on the same monthly credit allowance, so a plan is chosen by total testing volume rather than by feature.
Feature breakdown
20 features in 4 modulesSpam and content testing
The pre-send check: why a message might be filtered, itemized.- Spam score with reasons
- Returns a score alongside the specific factors behind it rather than an opaque number, so a fix is actionable instead of guesswork.
- Authentication checking
- Verifies SPF, DKIM, and DMARC results for the tested message. Note that this is a per-message check, not domain-wide DMARC report monitoring.
- Blacklist checking
- Checks whether the sending domain or IP appears on blocklists, which is one of the few structural causes of filtering that a sender can act on immediately.
- HTML and content analysis
- Flags HTML structure problems, risky content patterns, and link issues that push filter scores upward.
- Unlimited sender accounts
- Testing is not tied to a fixed number of sending addresses even on the free tier, so an agency can test from many client domains without buying seats.
- AI assistant
- An in-product assistant that explains findings and suggests copy changes, included on the free tier.
Inbox placement testing
Where a copy of the message actually landed, provider by provider.- Provider-level placement results
- Reports inbox, tab, or spam placement across Gmail, Outlook, Yahoo, and other providers, so you can tell a universal problem from a Microsoft-specific one.
- Seed list testing
- Send to a provided seed list from your own sending platform, which means the test reflects your real sending infrastructure rather than a simulated send.
- On-demand testing cadence
- Tests run whenever you send to the seed list rather than on a fixed schedule, so you control the cadence, limited only by your monthly credit allowance.
- Tab placement detection
- Distinguishes the promotions and updates tabs from the primary inbox at Gmail, which is the difference most marketers actually care about.
- Re-testing after fixes
- The workflow assumes iteration: test, fix authentication or content, test again, which is why credit volume rather than feature access is the pricing axis.
Rendering and design testing
The half that makes Unspam cheaper than buying two tools.- Fifty-plus real clients and devices
- Renders the message in Gmail, Outlook, Apple Mail, iPhone, Android, and others, using real clients rather than approximations.
- Light and dark mode previews
- Every client is rendered in both modes, which catches the invisible-logo and inverted-background failures that dark mode introduces and that nobody notices until a customer complains.
- Device previews
- Separate device-level previews metered independently from client previews, covering the mobile rendering that carries most opens.
- Attention heatmaps
- Predictive heatmaps showing where a reader's eye is likely to travel, which is a design input rather than a deliverability measure.
Plans and workflow
One credit pool, four test types, and a free tier that is genuinely usable.- Usable free tier
- Ten spam tests, three placement tests, ten previews, three device previews, and ten heatmaps a month with no credit card, which covers a solo sender running weekly campaigns.
- Shared monthly allowances
- Each test type has its own monthly quota rather than a single pooled credit, so heavy rendering use does not consume your placement testing budget.
- Agency-scale volume
- The Custom plan lets an agency buy exactly the test types it uses and nothing else, with per-test rates that fall as volume grows.
- White-label option
- A custom-quoted white-label tier for agencies presenting testing under their own brand.
- Self-serve signup
- Free through Business tiers are entirely self-serve; only Agency and white-label arrangements involve contact.
Use cases
4 documentedSolo newsletter operator
The weekly send has started landing in the promotions tab and the writer has no idea whether the cause is content, authentication, or reputation.
The free tier's three monthly placement tests plus spam scoring identify a failing DKIM signature and two risky link domains, both fixed before the next send at no cost.
Small agency running client campaigns
Six clients each need a pre-send check and a rendering pass, and buying a placement tool plus Litmus for each is out of the question.
A single Custom plan covers all six clients' testing volume, priced on the tests actually run, and unlimited sender accounts mean no per-client seat cost.
Ecommerce marketer debugging dark mode
Customers on iPhone report that the logo has disappeared from the header of the last three campaigns.
Dark mode previews across the device set reproduce the failure immediately, the template background is fixed, and the same test confirms the repair before the next send.
Founder investigating a sudden spam-folder problem
Transactional email started going to spam last week and the team does not know whether the cause is the domain, the content, or a blacklist.
A spam test isolates a blocklist entry on the sending IP, which is fixed with the provider, and repeat placement tests confirm recovery across Gmail and Outlook.
Pricing
from $0 (Free, 21 tests a month), then pay per test on CustomTwo free tiers plus a single paid Custom plan billed per test, at rates that fall with volume. The fixed Basic, Business, and Agency subscriptions were retired in 2026 and replaced by the pay-per-test model.
| Plan | Price | Includes |
|---|---|---|
| No account | $0 no signup, limits reset monthly |
Genuinely usable from the page without creating anything, which almost nothing else in this category allows. |
| Free | $0 per month |
Enough for a solo sender running a campaign a week, and it does not expire. |
| Custom | Pay per test rates fall as volume grows, billed monthly or annually |
This plan replaced the fixed tiers. The per-test rate is configured rather than published, so the entry cost depends entirely on the mix you choose. |
Billing notes
- The fixed $9 Basic, $19 Business, and $29 Agency tiers were retired during 2026. The page now states plainly that the Custom plan replaced them, so any comparison citing those three prices is out of date.
- Pay per test means there is no floor and no ceiling published. Rates drop as volume grows, but the starting rate is not on the page, so budgeting requires configuring a plan.
- Annual billing saves two months against monthly on the Custom plan.
- Every paid plan carries a 14-day refund.
- API and MCP access arrive only on Custom, which matters for anyone wanting to drive placement testing from a script or an AI assistant.
- The two free tiers are the real story for a small sender: 21 tests a month costs nothing and needs no card, and a smaller allowance needs no account at all.
Value assessment: On price, Unspam is not really competing with the dedicated placement platforms; it undercuts them heavily and folds in rendering testing that would otherwise be a separate Litmus or Email on Acid subscription. The move to pay-per-test makes the paid end harder to judge from outside, because no starting rate is published, but it also means a team that only wants placement tests stops subsidising the rendering features it never opens. The free end is where the value is now unambiguous: 21 tests a month at no cost, and a smaller allowance with no account at all. What you are buying either way is a competent generalist rather than the deepest instrument in any one dimension. GlockApps has a larger, better-documented seed panel and continuous monitoring; Litmus has more rendering depth. For a small business that needs both jobs done adequately, Unspam is the obvious purchase, and the free tier means the decision costs nothing to test.
Entry price history
Plans were restructured on 20 September 2026, so the current entry price is not directly comparable with the earlier one.
| Checked | Entry price | What happened |
|---|---|---|
| 20 September 2026 | Not published | The fixed $9 Basic, $19 Business, and $29 Agency subscriptions were retired in favour of a single Custom plan billed per test, at rates the page says fall with volume but does not publish. Two free tiers remain, one of which needs no account. |
| 22 August 2026 | $0 (Free), then $9 per month (Basic) | First recorded |
Dates are when SaaSTracker checked the vendor’s published pricing, not when the vendor changed it. See the price changes log for movements across the whole database.
Strengths & limitations
Strengths
- Bundles spam scoring, inbox placement testing, and cross-client rendering in one cheap subscription, replacing two separate tools for most small teams.
- A free tier that is genuinely usable, with three placement tests and ten spam tests a month and no credit card required.
- Unlimited sender accounts on every tier including free, so agencies do not pay per client domain.
- Light and dark mode rendering across more than fifty real clients and devices, which catches the failures that dark mode introduces and nobody sees by eye.
- Separate quotas per test type, so heavy design testing does not consume placement testing budget.
- Itemized spam scoring with reasons rather than an opaque number, which makes fixes actionable.
- Two free tiers with real monthly allowances, one of which needs no account at all, which almost nothing else in this category offers.
Limitations
- Seed testing measures a panel of test inboxes, not your actual recipients; personalized engagement history means a clean seed result and a spam-foldered campaign can coexist, and this is true of every placement tester, not just this one.
- Seed panel size and provider composition are less thoroughly documented than GlockApps publishes, so it is harder to judge how representative a result is.
- No continuous monitoring; testing is on-demand at the moment you send, so a reputation problem developing between campaigns goes unseen.
- No DMARC aggregate report ingestion, so it cannot tell you who else is sending as your domain or drive you to a p=reject policy.
- No warming or reputation building whatsoever, so a new domain or mailbox needs a separate tool before it can carry volume.
- Monthly quotas do not roll over, which penalizes bursty testing patterns.
- Company ownership, funding, and headcount are not publicly disclosed, which is a consideration for procurement at a larger buyer.
Head-to-head comparisons
8 alternativesUnspam vs MailGenius
from $0 (free spam test), then $23 per month (Beginner)Both are cheap pre-send spam testers. MailGenius leans into AI copy analysis and automatic testing of every outgoing message on its top plan, priced at $23 to $79 a month. Unspam is cheaper, adds cross-client rendering and heatmaps, and has a usable free tier. Take MailGenius if you want continuous automatic testing and copy rewriting; take Unspam if you want placement plus design testing in one cheap subscription.
Full Unspam vs MailGenius comparisonUnspam vs GlockApps
from $59/mo (Essential, billed annually)GlockApps is the more serious placement instrument, with a documented seed panel of seventy-plus addresses, multi-filter scoring, DMARC analytics, and continuous blacklist monitoring. Unspam is a fraction of the price and adds rendering testing GlockApps does not attempt. Choose GlockApps if placement measurement is a core operational discipline; choose Unspam if you need adequate placement evidence plus design QA on a small budget.
Full Unspam vs GlockApps comparisonUnspam vs MailReach
from $19.50 per mailbox per month, or $16 per mailbox per month billed annuallyMailReach both warms mailboxes through a real-inbox network and runs placement tests, so it fixes reputation as well as measuring it. Unspam only measures, and never touches reputation. If your cold outbound mailboxes are landing in spam, MailReach is the tool that can change that; Unspam will only keep telling you it is happening.
Full Unspam vs MailReach comparisonUnspam vs InboxDoctor
from $2 per mailbox per month (B2B Starter)InboxDoctor combines per-mailbox warming from $2 a month with placement test credits sold separately, aimed at cold outbound operators running many sending identities. Unspam is a campaign sender's tool with no warming at all. Outbound teams should take InboxDoctor; marketing teams testing newsletters and transactional templates should take Unspam.
Full Unspam vs InboxDoctor comparisonUnspam vs Folderly
from $96 per mailbox per month billed annually (Folderly), or $0 (Inbox Insights and Pulse free tiers)Folderly is a managed deliverability operation that monitors continuously and does remediation work on your behalf, priced accordingly. Unspam is a self-serve testing tool under $30 a month that tells you what is wrong and leaves the fixing to you. Take Folderly if you want the problem handled by someone else; take Unspam if you have the skills and want cheap evidence before each send.
Full Unspam vs Folderly comparisonUnspam vs MailerCheck
from $10 (1,000 credits, pay as you go)MailerCheck approaches deliverability from the list-quality and inbox-insights side within the MailerLite family, where Unspam is a standalone testing tool covering placement and rendering. If your sending already sits in that ecosystem, MailerCheck is the more integrated option; if you send from anywhere and want cheap cross-provider testing plus design QA, Unspam is the more flexible one.
Full Unspam vs MailerCheck comparisonUnspam vs MailStrike
from $18 per mailbox per month billed annually ($23 monthly) for the first five mailboxesUnspam scores messages, checks placement per provider, and previews rendering from one cheap credit pool, and does no warming. MailStrike warms the mailbox, scores reputation continuously, and bundles placement tests, but previews no rendering. The overlap is only in placement testing, so the two are complements more than rivals: Unspam checks what you send, MailStrike fixes how you send it.
Full Unspam vs MailStrike comparisonUnspam vs Mail-Tester
from $0 (3 tests per 24 hours), then $10 per month for 50 testsBoth are cheap pre-send checkers with real free tiers and they overlap less than the category page suggests. Unspam covers spam scoring plus inbox placement, rendering across 50-plus clients, screenshots, and heatmaps, giving 21 tests a month free and pay-per-test above. Mail-Tester does one job, a SpamAssassin score out of ten, three times a day free, with a much stronger API and white-label story. If broken dark-mode layouts and placement matter alongside the score, Unspam. If the score is the requirement, or you are embedding it, Mail-Tester.
Full Unspam vs Mail-Tester comparisonPairs well with
8 categoriesUnspam is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is Smartlead for cold email outreach, Maildoso for cold email infrastructure, MillionVerifier for email verification, Sender for email service providers, Outplay for sales engagement, Regie.ai for AI SDR agents, Zoho CRM for sales CRM and Umami for GTM analytics, each the leading tool in that category on published criteria.
- SmartleadCold Email Outreach · Best Value
- Because
- Unspam sends buyers elsewhere for seed results to predict what their actual list experiences. Smartlead adds true white-label portal.
- Benefit
- Outreach goes out on a schedule and replies land in one place instead of a personal inbox.
- MaildosoCold Email Infrastructure · Best Value
- Because
- Unspam sends buyers elsewhere for DMARC aggregate report monitoring. Maildoso adds a thirty-day money-back guarantee.
- Benefit
- Sending moves off the main domain, so a burned domain costs a spare rather than the company's email.
- MillionVerifierEmail Verification · Best Value
- Because
- Unspam sends buyers elsewhere for sender reputation built rather than measured. MillionVerifier adds cheapest published ladder among the general-purpose verifiers here.
- Benefit
- Dead addresses come off the list before the send, so the bounce rate never touches the domain.
- SenderEmail Service Providers · Best Value
- Because
- Unspam is built for deliverability, not ESPs. Sender adds most generous free tier in the category.
- Benefit
- An opt-in audience is owned rather than rented, and reaching it costs nothing per send.
- OutplaySales Engagement · Best Value
- Because
- Unspam lists no DMARC aggregate report ingestion among its limits. Outplay adds a genuinely usable free-forever tier plus a $39 entry plan.
- Benefit
- One cadence covers email, calls and LinkedIn, so nobody drops a follow-up between tools.
- Regie.aiAI SDR Agents · Best Value
- Because
- Unspam is built for deliverability, not AI SDR. Regie.ai adds only serious AI SDR platform with a genuinely free tier.
- Benefit
- Research, writing and sending happen without a headcount, and the meetings still get booked.
- Because
- Unspam is built for deliverability, not CRM. Zoho CRM adds unmatched capability per dollar.
- Benefit
- Every conversation ends up on a record, so a rep leaving does not take the pipeline with them.
- UmamiGTM Analytics · Best Value
- Because
- Unspam lists no warming or reputation building whatsoever among its limits. Umami adds a free Cloud tier at roughly 100,000 events a month with three.
- Benefit
- Spend gets attributed to revenue, so the channel that works is the one that gets funded.
Pairings follow the methodology: the leading tool in each complementary category, chosen on published criteria. Placement cannot be purchased.
Full Unspam stackImplementation & onboarding
- Setup time
- Under ten minutes. Create an account, send a test message to the address provided, and read the result. There is no DNS change, no mailbox connection, and no configuration.
- Learning curve
- Low. The spam score is itemized in plain language and the rendering previews are self-explanatory. The one thing a buyer must understand is what a seed test does and does not prove, and that is a conceptual point rather than a product one.
- Onboarding
- Fully self-serve from Free through Business, with no credit card required to start. Agency and white-label arrangements involve contact with the vendor.
- Migration notes
- Nothing to migrate. Placement testing keeps no state you would need to carry between vendors beyond historical test results, and moving to or from another tester is simply a matter of sending your next test somewhere else.
Platform, API & security
- Platforms
- Web applicationSeed list testing from any sending platform
- API
- Not published as a headline self-serve capability; the product is oriented around its web console.
- Compliance
- GDPR
- Data residency
- Not published as a customer-selectable option.
- SSO
- Not published on the self-serve tiers.
- Security notes
- Testing involves sending real message content to seed addresses operated by the vendor, so campaign copy and any personalization present in the test send is visible to the platform. Avoid using live customer data in test sends.
Support & resources
- Channels
- In-product AI assistantEmail supportVendor contact for agency and white-label arrangements
- Documentation
- Product documentation covering spam testing, placement testing, and rendering previews, oriented toward marketers rather than engineers.
- Community
- No large official user community.
Company
- Founded
- 2021
- Headquarters
- Not publicly disclosed
- Ownership
- Privately held, independent
- Employees
- Not disclosed
- Funding
- No disclosed outside funding.
Timeline
- 2021Launches as a free spam-score checker, competing with the long-standing free single-test tools by adding itemized reasons rather than a bare score.
- 2022Adds inbox placement testing across Gmail, Outlook, Yahoo, and other providers, moving from content scoring into placement measurement.
- 2023Adds rendering previews across more than fifty real clients and devices in light and dark mode, positioning against dedicated rendering platforms at a fraction of their price.
- 2024Adds attention heatmaps and an in-product AI assistant, and the Google and Yahoo bulk sender requirements push a wave of small senders into pre-send testing for the first time.
- 2026Retires the fixed Basic, Business, and Agency tiers in favour of a pay-per-test Custom plan, adds API and MCP access, Autopilot scheduling, and DMARC monitoring, and keeps two free tiers underneath.
Integrations
- Any sending platform, via seed list addresses
- Gmail and Google Workspace as tested providers
- Microsoft Outlook and Microsoft 365 as tested providers
- Yahoo and other consumer providers as tested providers
- Apple Mail, iPhone, and Android as rendering targets
- Blacklist and reputation data sources for spam scoring
Frequently asked questions
13 questionsWhat is Unspam?
Unspam is an email testing platform. It scores a message against spam filters with itemized reasons, runs inbox placement tests across Gmail, Outlook, Yahoo, and other providers, renders the message across more than fifty real clients and devices in light and dark mode, and produces attention heatmaps. It is used before a send rather than continuously.
Which of the three deliverability jobs does Unspam do?
Placement and spam testing. It does not warm mailboxes and it does not monitor DMARC aggregate reports across your domain. It checks authentication for the specific message you tested, which is not the same as knowing who else is sending as your domain or being able to reach a p=reject policy.
How much does Unspam cost?
There are two free tiers and one paid plan. A no-account tier runs 3 spam tests, 2 inbox placements, 1 device preview, 3 screenshots, and 1 heatmap a month straight from the page, with results kept 24 hours. The Free plan adds up to 21 tests a month with results kept 14 days and no credit card. The paid Custom plan replaced the old fixed tiers and is billed per test, at rates that fall as volume grows, adding 3 years of history, Autopilot scheduling, API and MCP access, and DMARC monitoring.
How large is the seed list and which providers does it cover?
Testing covers Gmail, Outlook and Microsoft, Yahoo, and other providers, with more than fifty real clients and devices used on the rendering side. Unspam publishes less detail about seed panel composition than GlockApps does, so it is harder to judge how representative any single result is. Treat placement results as directional evidence across providers rather than a precise measurement.
How often can I run tests?
Whenever you like, up to your monthly allowance. Tests are on-demand rather than scheduled, triggered by sending to the seed list from your own platform. Quotas reset monthly and do not roll over, so bursty testing may need a higher tier than your monthly average suggests.
Does a good seed test mean my real recipients got the email?
No, and this is the single most important caveat in placement testing. A seed inbox has no engagement history with you, while a real recipient does, and mailbox providers personalize filtering heavily on that history. A clean seed result tells you nothing is structurally wrong with authentication, content, or reputation; it does not prove that a specific subscriber saw your message in their inbox.
What does Unspam not do?
It does not warm mailboxes, build sender reputation, or send campaigns. It does not ingest DMARC aggregate reports or help you reach an enforced DMARC policy. It does not monitor continuously between sends. Buyers regularly purchase a placement tester when their actual problem is a cold, unwarmed sending domain, which testing will diagnose and never fix.
How does Unspam compare with buying a rendering tool separately?
That is its main commercial argument. Dedicated rendering platforms such as Litmus and Email on Acid charge a monthly seat price and do not include inbox placement testing. Unspam's rendering depth is shallower, but for a small team that needs to catch broken dark mode layouts and check placement, one plan replaces two, and the free tier covers a light month entirely.
Can an agency use one account for multiple clients?
Yes. Unlimited sender accounts are included on every tier including free, so testing from many different client domains does not incur per-seat or per-domain charges. The paid Custom plan exists to supply testing volume rather than to unlock multi-client use, and it is billed per test, so an agency pays for what its clients actually consume.
Who owns Unspam?
Unspam is an independent, privately held product with no disclosed outside funding, and the vendor publishes little company information. For a low-cost testing tool with no data dependency that matters less than it would for an authentication platform, but it is worth knowing before you build a process around it.
What should I pair Unspam with?
Unspam is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is Smartlead for cold email outreach, Maildoso for cold email infrastructure, MillionVerifier for email verification, Sender for email service providers, Outplay for sales engagement, Regie.ai for AI SDR agents, Zoho CRM for sales CRM and Umami for GTM analytics, each the leading tool in that category on published criteria.
What do I pair with Unspam for Cold Email Outreach?
Smartlead. Unspam sends buyers elsewhere for seed results to predict what their actual list experiences. Smartlead adds true white-label portal.
Is Unspam enough on its own?
For deliverability, yes. Unspam does not cover cold email infrastructure, email verification and email service providers, and its own profile says so; Maildoso, MillionVerifier and Sender are the tools that fill those gaps.
Editorial verdict
Unspam is the cheapest sensible way for a small business to answer two questions at once: is this message likely to be filtered, and does it look right on the devices people will read it on. Bundling placement testing with fifty-plus client renders in light and dark mode undercuts the combination of a deliverability tool and a rendering tool by a wide margin, unlimited sender accounts make it unusually agency-friendly, and the free tier is a real plan rather than a teaser. It is not the deepest instrument in either dimension: GlockApps documents a better seed panel and monitors continuously, and Litmus renders more thoroughly. And like every placement tester, it measures a panel of seed inboxes rather than your actual recipients, so a clean result is reassurance and not proof. Buy it for pre-send QA on a budget. Do not buy it expecting it to fix a reputation problem, because measuring is all it does.
Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.
Awards & badges
1 heldUnspam holds 1 award from the SaaSTracker editorial program. Badges may be displayed by the vendor; each embed links back to this profile.
Ease of Use · Email Deliverability & Warming
“A placement and spam test takes under ten minutes with no DNS change or mailbox connection, and the itemized score explains every fix in plain language.”
<a href="https://saastracker.org/products/unspam-email"><img src="https://saastracker.org/badges/embed/unspam-email/ease-of-use-summer-2026.svg?v=2" width="180" height="180" alt="Unspam: Ease of Use, Email Deliverability & Warming. SaaSTracker Summer 2026 Awards." /></a>