MailStrike vs TrulyInbox
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
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The short answer
Both sides assessedMailStrike compared with TrulyInbox
TrulyInbox prices by daily volume with unlimited mailboxes on every paid plan, warms in twelve languages, offers a genuine free plan, and supplies Saleshandy's warmup as a third-party partner. It documents no placement test and no seed lists. MailStrike is English-only with no free plan, but includes placement tests in every tier and sells Seed Lists standalone for campaign pre-sends. Volume-priced multilingual warming favors TrulyInbox; measurement and pre-send priming favor MailStrike.
TrulyInbox compared with MailStrike
TrulyInbox undercuts MailStrike on entry price with a free plan, unlimited mailboxes per tier, and warming in twelve languages, and it powers Saleshandy's warmup as a third-party partner. What it does not document is placement testing or seed lists. MailStrike is English-only with no free plan but bundles tests into every tier and sells Seed Lists standalone. Volume buyers pick TrulyInbox; buyers who need measurement pick MailStrike.
Choose MailStrike if
Outbound teams and agencies running fleets of mailboxes who want warming that is not templated, documented spam rescue for domains already in trouble, and a placement test on every mailbox, plus B2C senders who need seed-based placement and live spam rescue on a real campaign.
Choose TrulyInbox if
Outbound teams and agencies running ten or more sending mailboxes who want warming priced by volume rather than per seat, with API access to automate mailbox provisioning.
Side by side
13 attributes| Attribute | MailStrike | TrulyInbox |
|---|---|---|
| Category | Deliverability | Deliverability |
| Starting price | $18 per mailbox per month billed annually ($23 monthly) for the first five mailboxes (free trial) | $0 (Free), then $22 per month billed annually (Starter, $29 monthly) |
| Pricing model | Priced per mailbox per month on graduated rates: each mailbox is billed at the rate of the band it falls in, so the blended cost per mailbox falls as the fleet grows. Rates step down at 6, 11, 16, 21, 51, and 101 mailboxes, up to 200. Above that, and seed lists, are quoted. | Freemium subscription priced by total daily warmup email volume, with unlimited connected email accounts on every paid tier. |
| Free plan | No | One email account and ten warmup emails a day, permanently free, with basic deliverability tracking and chatbot support. |
| Free trial | No trial published. The free deliverability test is the no-cost entry point and needs a signup but no card | 7 days on paid plans |
| Best for | Outbound teams and agencies running fleets of mailboxes who want warming that is not templated, documented spam rescue for domains already in trouble, and a placement test on every mailbox, plus B2C senders who need seed-based placement and live spam rescue on a real campaign. | Outbound teams and agencies running ten or more sending mailboxes who want warming priced by volume rather than per seat, with API access to automate mailbox provisioning. |
| Setup time | Under two minutes per mailbox: one-click OAuth for Google Workspace and Microsoft 365, or an app password over SMTP and IMAP for Yahoo, Proton, iCloud, Zoho, Fastmail, and anything else. Onboarding is guided by the team. A fresh domain still needs the 21-day ramp before meaningful volume, with noticeable improvement around two weeks; seed list onboarding is arranged separately when that product is quoted. | Fifteen minutes to connect mailboxes and start warming. Three to six weeks of ramping before a mailbox is ready for real sending volume, which is the actual timeline and cannot be shortened by spending more. |
| Learning curve | Low. Persona warming and monitoring are automatic after connection; the placement tester is a single form. DNS fix guides assume no prior deliverability knowledge. | Low to operate, higher to use well. The configuration surface is larger than most warming tools, with four strategies, reply rates, schedules, and topic control, and the temptation is to turn everything up. Aggressive settings make traffic look less like correspondence, not more. |
| Platforms | Web app, MCP server, REST API (Custom plans) | Web application, Google Workspace connection, Microsoft 365 connection, SMTP and IMAP connection |
| Compliance | CASA Tier 2 (assessed and validated by TAC Security), Google OAuth verified, Microsoft OAuth verified, GDPR-aligned processes | GDPR |
| Founded | 2026 | 2023 |
| Headquarters | Poland | Not publicly disclosed |
| Ownership | Backed by IT Monks | Privately held and unfunded, associated with the team behind SalesBlink |
Strengths and limitations
MailStrike
Strengths
- An AI Agent per mailbox composes its threads at send time from the company description, so there is no template for a filter to fingerprint, which is the property shared-network and configured-pattern tools cannot replicate.
- Seed lists are sold standalone and need no warming plan, which lets a B2C sender buy per-provider placement and live spam rescue on a real campaign without subscribing to the warming product at all.
- Placement tests send from the user's own connected account through the real campaign path, with no seed lists to copy and no codes to paste.
- Spam rescue is documented and logged per event, so a customer can see each time a warming email was pulled out of spam rather than take the outcome on trust.
Limitations
- Agent threads are English-only, so programs sending mainly in other languages should look at Warmy, which documents more than 30 languages, or Warmup Inbox and TrulyInbox at 12.
- No free plan and no advertised free trial; every tier on the pricing page starts from a booked call, with a free deliverability assessment as the evaluation path.
- Deliverability tests are metered per tier (a single test a month on Solo), pricing above 20 mailboxes is quoted, and the Seed Lists add-on is priced per customer rather than self-serve.
- Deliverability-focused by design: MailStrike sends no campaigns, so it always runs alongside a sending platform rather than replacing one.
TrulyInbox
Strengths
- Volume-based pricing with unlimited accounts on every paid tier, which makes cost predictable while the sending estate churns.
- Effective per-mailbox cost falls as you scale, reaching around $3.40 a mailbox at fifty, cheaper than most per-seat competitors.
- API access from the $22 entry tier, where most of the category treats it as an enterprise feature.
- Four warming strategies with fine-tuning and configurable reply rates, which is more control than most warming tools expose.
Limitations
- Automated warming is contested practice. It manufactures engagement that does not reflect real correspondence, providers have improved at detecting reciprocal warming networks, and Google has publicly discouraged it. Use it to ramp genuinely new mailboxes, not to rescue unwanted campaigns.
- Network composition and quality cannot be independently verified by a buyer, here or at any warming vendor.
- No seed-list inbox placement testing, so the deliverability score reflects placement of warming traffic inside the network rather than placement of your real campaigns with real recipients.
- No DMARC report monitoring or authentication management of any kind.
Pricing compared
MailStrike
Priced per mailbox per month on graduated rates: each mailbox is billed at the rate of the band it falls in, so the blended cost per mailbox falls as the fleet grows. Rates step down at 6, 11, 16, 21, 51, and 101 mailboxes, up to 200. Above that, and seed lists, are quoted.
- Mailboxes 1 to 5$18
- Mailboxes 6 to 10$16
- Mailboxes 11 to 15$14
- Mailboxes 16 to 20$11
- Mailboxes 21 to 50$9
- Mailboxes 51 to 100$7
- Mailboxes 101 to 200$5
- CustomQuoted
The September 2026 move to graduated per-mailbox rates changed who this is good value for. At one mailbox nothing moved: $18 a month, against $15 at Warmbox and Warmup Inbox and about $2 at InboxDoctor, and the agent architecture is what the premium buys. At six mailboxes the bill went from $45 to $106 and at twenty from $92 to $295, so teams that were buying a flat band and filling it have seen a real increase. Where the new model reads well is at scale, because the blended rate falls to about $9.15 a mailbox at a hundred and $7.08 at two hundred, which undercuts MailReach at $19.50 and Warmup Inbox at $15 while including a placement test per mailbox per month that both charge for. Judge it on the fleet you actually run rather than the headline: this is now among the cheapest options above fifty mailboxes and among the more expensive below ten.
TrulyInbox
Freemium subscription priced by total daily warmup email volume, with unlimited connected email accounts on every paid tier.
- Free$0
- Starter$22
- Growth$84
- Scale$169
- Scale PlusFrom $407
The volume model is the whole argument, and it is a good one above roughly ten mailboxes. Fifty mailboxes for $169 a month at around $3.40 each undercuts per-seat competitors, the bill stays constant as the estate churns, and API access at the entry tier means an outbound stack can provision warming automatically. Below ten mailboxes the maths reverses and InboxDoctor's $2 to $6 per mailbox is cheaper. What you do not get at any tier is seed-list placement testing, so the deliverability score you see reflects where warming mail lands inside the network rather than where your campaigns land with real recipients, and that distinction matters more than the price difference between vendors.
Editorial verdict on each
MailStrike
InnovationMailStrike's argument is that templated warming has stopped working, and its answer is to give every mailbox an agent rather than a configuration: a persona with its own reply rate, dwell time, active hours and typo chance, composing each thread at send time from the sender's own company description so there is no pattern to fingerprint. Whether that beats a well-configured shared network is not something a buyer can verify from outside, and the honest framing is that it is the most specific architectural claim in the category rather than a proven one. What is verifiable is the surrounding kit, and it is strong: documented spam rescue logged per event, a placement test included per mailbox per month where most rivals sell tests as credits, a daily reputation score with a 14-day trend, an AI assistant writing a daily summary per mailbox, broad provider coverage, and standalone seed lists for B2C senders. The September 2026 repricing is the thing to model before buying. A single mailbox still costs $18, but six went from $45 to $106 and twenty from $92 to $295, while the graduated rates make large fleets genuinely cheap at about $9.15 a mailbox at a hundred and $7.08 at two hundred. Below ten mailboxes this is now one of the more expensive options in the category; above fifty it is one of the cheapest. English-only warming remains the hard limit, and there is no trial, so the free deliverability test and a booked call are the way in.
Read the full MailStrike profileTrulyInbox
TrulyInbox is the warming tool to buy if you run a lot of mailboxes or a sending estate that changes every month. Pricing by daily volume with unlimited accounts keeps the bill flat while mailboxes come and go, the effective cost falls to around $3.40 a mailbox at fifty, and API access from the $22 entry tier makes automated provisioning practical in a way most competitors reserve for enterprise contracts. The configuration depth, four ramp strategies and adjustable reply rates, is real and should be used conservatively rather than turned up. Two things temper the recommendation. Below ten mailboxes, per-mailbox vendors are simply cheaper. And there is no seed-list placement testing at any tier, so the deliverability score tells you about warming traffic inside a network that is designed to like you, not about your campaigns reaching strangers. Pair it with a placement tester, keep the honest caveat about warming as contested practice in view, and it is a well-shaped product for exactly one job.
Read the full TrulyInbox profileMailStrike profile last reviewed 2026-09-26; TrulyInbox last reviewed 2026-09-20. Pricing is compiled from public sources and can change without notice. See our methodology.
The best in Email Deliverability & Warming
23 trackedEmail deliverability and warming tools build and protect sender reputation by exchanging positive engagement signals between real inboxes, and by monitoring where a sender's mail actually lands.
The most complete pairing of warming network quality with actionable spam-placement testing in the category.
A free tier with real test credits and a $59 entry point put audit-grade placement, DMARC, and blacklist visibility within any sender's budget.
Founded in 2024, InboxDoctor undercuts the entire warming market at $2 per mailbox with Google Postmaster integration included on every tier.
Rethought warming twice in one product: an AI Persona behind every mailbox in place of detectable network patterns, and a seedlist of thousands of trusted inboxes that campaigns are pre-sent to at scale for delivery feedback and engagement before launch.
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.
Frequently asked questions
6 questionsWhat is the difference between MailStrike and TrulyInbox?
TrulyInbox prices by daily volume with unlimited mailboxes on every paid plan, warms in twelve languages, offers a genuine free plan, and supplies Saleshandy's warmup as a third-party partner. It documents no placement test and no seed lists. MailStrike is English-only with no free plan, but includes placement tests in every tier and sells Seed Lists standalone for campaign pre-sends. Volume-priced multilingual warming favors TrulyInbox; measurement and pre-send priming favor MailStrike.
Is MailStrike or TrulyInbox cheaper?
MailStrike starts at $18 per mailbox per month billed annually ($23 monthly) for the first five mailboxes (free trial). TrulyInbox starts at $0 (Free), then $22 per month billed annually (Starter, $29 monthly). The billing models differ, so the entry price is rarely the whole cost. MailStrike pricing model: Priced per mailbox per month on graduated rates: each mailbox is billed at the rate of the band it falls in, so the blended cost per mailbox falls as the fleet grows. Rates step down at 6, 11, 16, 21, 51, and 101 mailboxes, up to 200. TrulyInbox pricing model: Freemium subscription priced by total daily warmup email volume, with unlimited connected email accounts on every paid tier.
Does MailStrike or TrulyInbox have a free plan?
MailStrike has no free plan. Trial terms: No trial published. The free deliverability test is the no-cost entry point and needs a signup but no card. TrulyInbox has a free plan. One email account and ten warmup emails a day, permanently free, with basic deliverability tracking and chatbot support. Trial terms: 7 days on paid plans.
Who should choose MailStrike?
Outbound teams and agencies running fleets of mailboxes who want warming that is not templated, documented spam rescue for domains already in trouble, and a placement test on every mailbox, plus B2C senders who need seed-based placement and live spam rescue on a real campaign.
Who should choose TrulyInbox?
Outbound teams and agencies running ten or more sending mailboxes who want warming priced by volume rather than per seat, with API access to automate mailbox provisioning.
What are the best alternatives to MailStrike and TrulyInbox?
SaaSTracker profiles 23 products in Email Deliverability & Warming. The Summer 2026 awards in the category went to MailReach (Category Leader), GlockApps (Best Value), InboxDoctor (Momentum). Every profile is compiled from primary sources, so a shortlist can be built from pricing, limitations, and fit rather than from star ratings.
