TrulyInbox
Warming priced by daily volume, with unlimited mailboxes on every paid plan
TrulyInbox is an email warming platform that ramps sending reputation on connected mailboxes by exchanging AI-generated conversational messages with a network of inboxes, and prices by total daily warmup volume rather than per mailbox so every paid plan allows unlimited connected accounts; it is a warming tool and does not run seed-list placement tests, monitor DMARC reports, or send campaigns.
Overview
TrulyInbox does the first job in this category, inbox warming, and only that. It connects to your sending mailboxes, exchanges conversational messages with a network of other inboxes, ramps daily volume on a curve, opens and replies to the traffic, and rescues messages that land in spam. The intent is to build a history of apparently normal correspondence on a mailbox before it starts sending real outbound, so that filters do not treat its first campaign as the behaviour of a stranger.
The pricing model is the reason to look at it. Almost every warming vendor charges per mailbox, which means the bill scales linearly with the size of your sending estate. TrulyInbox charges by total daily warmup volume and allows unlimited connected accounts on every paid plan. Starter at $22 a month billed annually covers two hundred warmup emails a day, roughly three mailboxes at normal ramp rates. Growth at $84 covers a thousand a day, roughly fifteen mailboxes. Scale at $169 covers three thousand a day, roughly fifty mailboxes. That works out to around $3.40 per mailbox at fifty, against $4 per mailbox on a per-seat competitor, and the gap widens as you grow.
The feature set is built around four warming strategies with fine-tuning, AI-generated content on topics you choose, custom schedules, deliverability scoring, ESP analytics, and API access from the entry tier. There is a permanently free plan covering one account and ten warmup emails a day, which is enough to see the mechanism working and nothing more, plus a seven-day trial on the paid tiers. TrulyInbox is associated with the team behind SalesBlink and is an unfunded company founded in 2023.
The caveat that belongs on every warming product belongs here in full. Automated warming manufactures engagement that does not correspond to real correspondence. Mailbox providers have grown steadily better at recognizing reciprocal warming traffic, and Google has publicly discouraged the practice. The defensible use is ramping a genuinely new mailbox before it sends mail people actually want. The indefensible use, and the one a large part of this market is buying for, is trying to make an unwanted campaign land in the inbox, which warming does not achieve at any volume or price.
Best for
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.
Not the right fit for
- Anyone who needs seed-list inbox placement testing; TrulyInbox scores deliverability from its own warming traffic and does not run placement tests across a seed panel the way GlockApps or Unspam do.
- Buyers looking for DMARC monitoring or authentication management; there is none here, and a domain with broken SPF or DKIM will not be rescued by warming.
- Teams running one or two mailboxes; per-mailbox competitors like InboxDoctor are cheaper at that scale, at $2 to $6 a mailbox against $22 a month for the entry volume plan.
- Senders who believe warming will make an unwanted campaign welcome; artificial engagement collapses the moment real recipients start marking mail as spam.
- Organizations that need a mature vendor relationship or procurement-grade security documentation; TrulyInbox is a small unfunded company founded in 2023 that asks for access to production mailboxes.
How it works
- 1
You connect sending mailboxes over Google Workspace, Microsoft 365, or SMTP and IMAP. Because pricing is by volume rather than by account, you can connect as many as you like on any paid plan and split your daily allowance across them.
- 2
The platform begins exchanging messages between your mailboxes and its network. Traffic ramps according to the warming strategy and schedule you choose, and messages that land in a network recipient's spam folder are opened and moved to the inbox, which is the specific signal warming exists to generate.
- 3
Content is generated by AI on topics you select, so warming threads resemble the kind of business correspondence your mailbox would plausibly carry rather than obvious filler. Reply rates are configurable and rise with plan tier, from around twenty-five percent on Starter to sixty percent on Scale.
- 4
Deliverability scoring and ESP analytics track how the connected mailboxes are performing over time, and API access from the entry tier lets an outbound platform start and stop warming programmatically as mailboxes are provisioned and retired.
Feature breakdown
20 features in 4 modulesWarming engine
The core job, with more configurability than most warming tools expose.- Network-based warming
- Connected mailboxes exchange messages with a network of inboxes, generating opens, replies, and spam rescues. As at every warming vendor, network composition is the vendor's claim rather than something a buyer can audit.
- Four warming strategies
- Multiple ramp approaches rather than a single curve, with all four unlocked from the Growth tier; the entry tier uses AI adaptive warmup.
- AI adaptive warmup
- Adjusts the ramp based on how the mailbox is performing rather than following a fixed schedule, available from the Starter tier.
- Configurable reply rates
- Up to twenty-five percent on Starter, forty-five on Growth, and sixty on Scale, which is a rare instance of a warming vendor exposing this dial rather than hiding it.
- Spam rescue
- Messages landing in a network recipient's spam folder are opened and moved to the inbox, the specific behaviour warming is trying to teach filters.
- Custom schedules
- Control when warming traffic runs, from the Growth tier, so warmup does not send at three in the morning while your real mail sends at nine.
- Fine-tuning options
- Granular adjustment of warming behaviour on Growth and above, for operators who want to shape the traffic rather than accept a default.
Content generation
Making the warming traffic look like correspondence rather than filler.- AI content generation
- Warming messages are generated rather than drawn from a fixed template pool, included from the Starter tier.
- Topic-based content
- From the Growth tier, you choose the subject matter so warming threads resemble the business your mailbox actually conducts.
- Threaded conversations
- Traffic is structured as replies within threads rather than isolated messages, which is the pattern filters treat as legitimate correspondence.
Measurement and integration
What you can see, and what you can automate.- Deliverability scoring
- A score per mailbox derived from where warming traffic lands, available from the Starter tier. Note that this measures placement of warming mail within the network, not placement of your real campaigns with real recipients.
- ESP analytics
- Breaks performance down by receiving provider from the Growth tier, so a Microsoft-specific problem is distinguishable from a general one.
- API access
- Available from the Starter tier at $22 a month, which is unusually low in a category where API access is often an enterprise feature; it lets an outbound stack start and stop warming as mailboxes are provisioned.
- Basic deliverability tracking on free
- Even the free plan exposes tracking, so the mechanism can be observed before any spend.
Plans and connectivity
Volume-based pricing with unlimited accounts, and what connects.- Unlimited email accounts on all paid tiers
- The structural differentiator: you pay for warmup emails sent, not for accounts connected, so adding a mailbox costs nothing until it consumes volume.
- Volume tiers
- Two hundred warmup emails a day on Starter, a thousand on Growth, three thousand on Scale, and five thousand to twenty thousand on Scale Plus.
- Permanently free plan
- One account and ten warmup emails a day, forever, with basic deliverability tracking and chatbot support.
- Seven-day trial on paid plans
- Short relative to a warming ramp, which takes several weeks, but enough to evaluate the interface and the network's behaviour.
- Mailbox connectivity
- Google Workspace, Microsoft 365, and generic SMTP and IMAP, which covers the infrastructure outbound teams and agencies actually use.
- Support tiering
- Chatbot on free, standard support on Starter, priority from Growth, and a dedicated account manager with priority onboarding on Scale.
Use cases
4 documentedAgency running fifty client mailboxes
A per-mailbox warming vendor would charge two hundred dollars a month at that count, and the estate changes constantly as clients come and go.
Scale at $169 a month billed annually covers three thousand warmup emails a day across unlimited accounts, so mailboxes can be added and retired without a billing change, and the API automates the provisioning.
Outbound team spinning up new domains quarterly
Every new campaign needs fresh domains and mailboxes warmed for several weeks before real sending starts, and the finance team dislikes a bill that moves every month.
A fixed volume plan keeps the cost constant regardless of how many mailboxes are in the warming pool at any moment, and API access starts warming automatically as each mailbox is created.
Founder testing whether warming is worth paying for
The team has read conflicting advice about warming and does not want to spend before understanding the mechanism.
The permanently free plan warms one account at ten emails a day with basic tracking, enough to watch the traffic and form a view before committing to a subscription.
Sender whose mailbox reputation is uneven across providers
Mail reaches Gmail reliably but lands in junk at Microsoft, and the team cannot tell whether that is content, authentication, or reputation.
ESP analytics on the Growth tier separates performance by receiving provider, which points at a Microsoft-specific reputation problem, though confirming it against real recipients still needs a separate placement tester.
Pricing
from $0 (Free), then $22 per month billed annually (Starter, $29 monthly)Freemium subscription priced by total daily warmup email volume, with unlimited connected email accounts on every paid tier.
| Plan | Price | Includes |
|---|---|---|
| Free | $0 per month |
Enough to observe the mechanism, not enough to warm anything you intend to send from. |
| Starter | $22 per month billed annually ($29 monthly) |
API access at $22 a month is unusually generous; most competitors reserve it for enterprise tiers. |
| Growth | $84 per month billed annually ($99 monthly) |
Roughly $5.60 per mailbox a month at fifteen mailboxes. |
| Scale | $169 per month billed annually ($199 monthly) |
Roughly $3.40 per mailbox a month at fifty mailboxes, which is where the volume model beats per-seat pricing. |
| Scale Plus | From $407 per month billed annually |
|
Billing notes
- Pricing is by warmup emails sent per day, not by accounts connected, so the effective per-mailbox cost falls as you scale: around $7.30 a mailbox at three, $5.60 at fifteen, and $3.40 at fifty.
- Annual billing saves roughly fifteen to twenty percent against monthly on every paid tier.
- Mailbox counts quoted per tier assume normal ramp rates; a mailbox warming aggressively consumes more of the daily allowance, so the real capacity of a plan depends on how hard you ramp.
- At five mailboxes, expect to be on Starter at $22 a month, which is roughly $4.40 per mailbox and slightly more than per-seat competitors charge at that count.
- At fifty mailboxes, Scale at $169 works out cheaper per mailbox than most per-seat vendors, which is the scale at which this model is designed to win.
- API access is included from the $22 Starter tier rather than gated to an enterprise plan, which is worth real money to any team automating mailbox provisioning.
- The free plan is permanent rather than a trial, but at ten emails a day on one account it is a demonstration rather than a working warming programme.
Value assessment: 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.
Strengths & limitations
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.
- Topic-based AI content generation so warming threads resemble the business the mailbox actually conducts.
- ESP analytics separate performance by receiving provider, which distinguishes a Microsoft problem from a general one.
- A permanently free plan, not just a trial, so the mechanism can be observed at zero cost.
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.
- More expensive than per-seat competitors below roughly ten mailboxes; at three mailboxes the effective cost is over $7 each.
- The seven-day trial is short relative to a warming ramp, which takes several weeks to demonstrate anything meaningful.
- Quoted mailbox counts per tier are estimates that depend on how hard you ramp, so plan capacity is fuzzier than a per-seat count.
- Small unfunded company founded in 2023 that requires access to production sending mailboxes, which is a meaningful trust decision.
Head-to-head comparisons
6 alternativesTrulyInbox vs InboxDoctor
from $2 per mailbox per month (B2B Starter)The two price warming in opposite ways and the crossover is around ten mailboxes. InboxDoctor charges $2 to $6 per mailbox, so five mailboxes is $10 to $30 a month and fifty is $100 to $300. TrulyInbox charges by daily volume with unlimited accounts, so five mailboxes sits on the $22 Starter plan and fifty on the $169 Scale plan. Small estates should take InboxDoctor; anything above twenty mailboxes, or any estate that churns, should take TrulyInbox.
Full TrulyInbox vs InboxDoctor comparisonTrulyInbox vs MailReach
from $25/mailbox/moMailReach is the more established warming specialist and bundles spam placement testing, which TrulyInbox does not offer at any tier. TrulyInbox is cheaper at scale and exposes more warming configuration, including reply rates and four ramp strategies. Take MailReach if you want warming plus placement evidence from one vendor; take TrulyInbox if you are warming a large, changing estate and will test placement elsewhere.
Full TrulyInbox vs MailReach comparisonTrulyInbox vs Warmbox
from $15/mo (Solo, billed annually)Warmbox is a straightforward per-mailbox warming service in the same mould as most of the category. TrulyInbox's volume model with unlimited accounts is the structural difference, and it pays off above roughly ten mailboxes. Below that, per-mailbox pricing is simpler and usually cheaper. Compare on your actual mailbox count rather than on headline prices.
Full TrulyInbox vs Warmbox comparisonTrulyInbox vs Mailivery
from $21.75/mo (Starter, billed annually; $29 monthly)Mailivery warms through real inbox interactions with an emphasis on sender reputation for sales teams. TrulyInbox differentiates on pricing shape rather than on mechanism, with unlimited accounts and API access from the entry tier. Choose on scale and automation needs: TrulyInbox for large or automated estates, Mailivery if its reporting suits your team better at comparable cost.
Full TrulyInbox vs Mailivery comparisonTrulyInbox vs GlockApps
from $59/mo (Essential, billed annually)These are complements rather than competitors, and confusing them is a common and expensive mistake. GlockApps measures where mail lands using a documented seed panel and monitors blacklists and DMARC, with no warming. TrulyInbox warms mailboxes and never tests real placement. A serious outbound operation runs one of each.
Full TrulyInbox vs GlockApps comparisonTrulyInbox vs Warmup Inbox
from $15/inbox/mo (Basic, billed annually at $180/yr)Both are dedicated warming networks aimed at outbound senders. The decision is pricing shape and configuration depth: TrulyInbox charges by daily volume with unlimited accounts and exposes reply rates and multiple ramp strategies, while per-mailbox competitors keep billing simpler at small counts. Model your mailbox count at both twelve months out and today before choosing.
Full TrulyInbox vs Warmup Inbox comparisonImplementation & onboarding
- Setup time
- 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 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.
- Onboarding
- Self-serve with a permanently free plan and a seven-day trial on paid tiers. Priority support arrives at Growth and a dedicated account manager with priority onboarding at Scale.
- Migration notes
- Switching warming vendors means disconnecting mailboxes from one platform and connecting them to another; reputation lives with the mailbox rather than the tool, so nothing is lost, but no history transfers either. Do not run two warming services on the same mailbox at once, since the combined volume looks more artificial than either alone. The API makes bulk connection and disconnection practical for large estates.
Platform, API & security
- Platforms
- Web applicationGoogle Workspace connectionMicrosoft 365 connectionSMTP and IMAP connection
- API
- API access is included from the Starter tier at $22 a month, allowing programmatic connection and control of warming as mailboxes are provisioned and retired.
- Compliance
- GDPR
- Data residency
- Not published as a customer-selectable option.
- SSO
- Not offered on the published tiers.
- Security notes
- Warming requires granting send and read access to production sending mailboxes, a considerably larger trust decision than a testing tool asks for. Review the connection scopes carefully on Google Workspace and Microsoft 365, and prefer dedicated outbound mailboxes over any account holding sensitive correspondence.
Support & resources
- Channels
- Chatbot support on the free planStandard support on StarterPriority support from GrowthDedicated account manager on Scale
- Documentation
- Product documentation covering mailbox connection, warming strategies, schedules, and the API.
- Community
- No large official user community; the product is documentation-led.
Company
- Founded
- 2023
- Headquarters
- Not publicly disclosed
- Ownership
- Privately held and unfunded, associated with the team behind SalesBlink
- Employees
- Not disclosed; small team
- Funding
- No disclosed outside funding.
Timeline
- 2023Founded as a dedicated warming product, associated with the team behind the SalesBlink outbound platform, and priced by daily warmup volume rather than per mailbox.
- 2023Saleshandy directs its own warm-up users to TrulyInbox, establishing it as a standalone warming service used alongside third-party sending tools.
- 2024The Google and Yahoo bulk sender requirements tighten expectations on sender behaviour, raising both demand for warming and scrutiny of the practice itself.
- 2025Expands the configuration surface with four warming strategies, fine-tuning, topic-based AI content, custom schedules, and ESP-level analytics.
- 2026Continues to price by daily volume with unlimited accounts on every paid plan and API access from the entry tier, positioning against per-mailbox competitors at scale.
Integrations
- Google Workspace and Gmail
- Microsoft 365 and Outlook
- Generic SMTP and IMAP mailboxes
- API for programmatic mailbox connection and warming control
- Any sending platform, since warming operates on the mailbox rather than the sending tool
- Saleshandy, which directs its warm-up users here
Frequently asked questions
10 questionsWhat is TrulyInbox?
TrulyInbox is an email warming platform. It connects to your sending mailboxes and exchanges AI-generated conversational messages with a network of inboxes, ramping daily volume and producing opens, replies, and spam rescues so mailbox providers treat a new sender as legitimate. It prices by total daily warmup volume rather than per mailbox, so every paid plan allows unlimited connected accounts.
Which of the three deliverability jobs does TrulyInbox do?
Inbox warming only. It does not run seed-list inbox placement tests and it does not monitor DMARC aggregate reports or manage authentication records. Its deliverability score reflects where warming traffic lands inside its own network, which is not the same as where your real campaigns land with real recipients.
How much does TrulyInbox cost per mailbox?
It does not charge per mailbox, which is the point. Starter is $22 a month billed annually for two hundred warmup emails a day, roughly three mailboxes, or about $7.30 each. Growth is $84 for a thousand a day, roughly fifteen mailboxes, or about $5.60 each. Scale is $169 for three thousand a day, roughly fifty mailboxes, or about $3.40 each. At five mailboxes you would be on Starter at roughly $4.40 per mailbox.
Is the warming network real mailboxes or simulated?
The vendor describes a network of real inboxes exchanging conversational messages. As with every warming vendor, network composition cannot be audited by a buyer, so treat quality claims across this entire category as unverifiable. Judge instead on ramp behaviour, content realism, whether replies are threaded, and whether the tool lets you dial traffic down rather than only up.
Does email warming actually work?
It is contested, and any honest review has to say so. Warming manufactures engagement signals that do not correspond to real correspondence, mailbox providers have become better at recognizing reciprocal warming networks, and Google has publicly discouraged the practice. The defensible use is gradually ramping a genuinely new mailbox before it sends mail that recipients want. It will not make an unwanted campaign welcome, and no amount of warming volume changes that.
Why does unlimited accounts matter?
Because outbound sending estates churn constantly. On a per-mailbox plan, every mailbox you add or retire changes the bill and often the plan. On TrulyInbox you buy a daily volume and split it across as many mailboxes as you like, so the cost is fixed while the estate moves. Combined with API access from the entry tier, that makes automated provisioning practical.
What is the crossover point against per-mailbox warming tools?
Around ten mailboxes. Below that, per-mailbox vendors such as InboxDoctor at $2 to $6 a mailbox are cheaper: five mailboxes costs $10 to $30 there against $22 here. Above twenty mailboxes the volume model wins, and at fifty mailboxes TrulyInbox's $169 Scale plan works out cheaper per mailbox than most per-seat alternatives.
Does TrulyInbox tell me whether my campaigns reach the inbox?
Not really, and this is the most important limitation to understand. Its deliverability score is derived from where warming traffic lands within its own network of inboxes, which have a relationship with your mailbox by design. Real recipients do not. If you need evidence of where campaigns land, you need a seed-list placement tester such as GlockApps or Unspam alongside it, and even those measure a seed panel rather than your actual list.
What does TrulyInbox not do?
It does not send campaigns, verify or clean lists, run seed-list placement tests, monitor DMARC reports, or manage SPF, DKIM, and DMARC records. It warms mailboxes. Buyers routinely purchase a warming tool when their real problem is broken authentication or a bad list, neither of which warming can address.
Who owns TrulyInbox?
TrulyInbox is a privately held, unfunded company founded in 2023 and associated with the team behind the SalesBlink outbound platform. It is early-stage and does not publish detailed company information, which is worth weighing given that warming requires granting access to your production sending mailboxes.
Editorial verdict
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.
Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.