TrulyInbox vs Warmup Inbox
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Editorial assessmentTrulyInbox compared with Warmup Inbox
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.
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.
Choose Warmup Inbox if
Outbound teams and agencies that want per-inbox warming with high daily-volume headroom, real blacklist monitoring with delisting help, and warm-up customization (templates, topics, languages, ESP-specific patterns) for senders that need warming traffic to resemble their real mail.
Side by side
13 attributes| Attribute | TrulyInbox | Warmup Inbox |
|---|---|---|
| Category | Deliverability | Deliverability |
| Starting price | $0 (Free), then $22 per month billed annually (Starter, $29 monthly) (free plan available) | $15/inbox/mo (Basic, billed annually at $180/yr) (7 days trial) |
| Pricing model | Freemium subscription priced by total daily warmup email volume, with unlimited connected email accounts on every paid tier. | Per-inbox monthly subscription in three tiers that scale daily warm-up volume, reply rate, and feature depth; annual billing saves 20 percent, and custom agency plans start at 15 inboxes. |
| Free plan | One email account and ten warmup emails a day, permanently free, with basic deliverability tracking and chatbot support. | No |
| Free trial | 7 days on paid plans | 7 days, full access to the chosen plan, no credit card required up front |
| 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. | Outbound teams and agencies that want per-inbox warming with high daily-volume headroom, real blacklist monitoring with delisting help, and warm-up customization (templates, topics, languages, ESP-specific patterns) for senders that need warming traffic to resemble their real mail. |
| 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. | Minutes per inbox via OAuth or SMTP; the vendor claims 90 percent primary placement by day 14, but 2 to 4 weeks remains the realistic window before a new domain carries campaign volume. |
| 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. | Low on Basic, where defaults do the work; moderate on Pro and Max, where templates, topics, ESP-specific settings, and scheduling reward deliberate configuration. |
| Platforms | Web application, Google Workspace connection, Microsoft 365 connection, SMTP and IMAP connection | Web app, Developers API (all tiers, unlimited on Max) |
| Compliance | GDPR | GDPR-aligned processes with a published data processing agreement |
| Founded | 2023 | 2020 |
| Headquarters | Not publicly disclosed | Bratislava, Slovakia (operated by CyberPanda s.r.o., part of the itrinity portfolio) |
| Ownership | Privately held and unfunded, associated with the team behind SalesBlink | Owned by itrinity (acquired November 2021) |
Strengths and limitations
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.
Warmup Inbox
Strengths
- Highest published per-inbox volume ceiling in its peer group (1,000 warm-up messages a day on Max), suited to warming infrastructure and aggressive senders.
- Blacklist monitoring across 100+ lists with delisting assistance is real remediation tooling, not just an alert feed.
- The Pro customization layer (custom templates, topics, language warm-up, ESP-specific patterns) makes warming traffic resemble actual sending better than generic warmers manage.
- API access on every tier, unlimited on Max, gives agencies and platforms a programmatic surface most competitors reserve for enterprise deals.
Limitations
- Per-inbox pricing compounds quickly; multi-mailbox teams pay multiples of what shared-pool or unlimited-mailbox competitors charge.
- Headline performance claims (98 percent primary placement, 90 percent by day 14) are self-reported vendor benchmarks with no independent audit.
- No seed-panel placement testing or DMARC analytics; measurement beyond warm-up traffic and list status requires a separate diagnostics tool.
- The bundled outreach-sequences feature is thin next to dedicated sequencers and should not factor into the buying decision.
Pricing compared
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.
Warmup Inbox
Per-inbox monthly subscription in three tiers that scale daily warm-up volume, reply rate, and feature depth; annual billing saves 20 percent, and custom agency plans start at 15 inboxes.
- Basic$15 per inbox
- Pro$49 per inbox
- Max$79 per inbox
- Agency / volumeCustom
Warmup Inbox prices capability, not just quantity: $15 buys a competent standard warmer with monitoring, $49 buys the customization that makes warming traffic resemble your real mail, and $79 buys volume headroom (1,000/day) almost nobody else publishes. For one to a few inboxes that ladder is fair, and the blacklist monitoring with delisting help does work competitors charge separately for. The weakness is arithmetic: per-inbox billing compounds, and a 10-mailbox team at Pro pays $490 a month where Mailivery's Business tier covers unlimited mailboxes for $199. Buy Warmup Inbox for depth per inbox; buy elsewhere for breadth of inboxes.
Editorial verdict on each
TrulyInbox
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 profileWarmup Inbox
Warmup Inbox is the depth-per-inbox pick among warming networks. The Pro customization layer and Max's 1,000-a-day ceiling solve real problems generic warmers cannot (non-English senders, ESP-specific patterns, infrastructure warming), and blacklist monitoring with delisting help plus an API on every tier make it operationally serious for a tool starting at $15. Its structural weakness is the meter: per-inbox billing turns a large mailbox roster into a large invoice, exactly the scenario shared-pool and bundled-warming competitors are built to win. Choose Warmup Inbox to warm a limited set of inboxes hard and watch their reputation properly; choose Mailivery or a sequencer's built-in warming when mailbox count, not warming depth, is the problem.
Read the full Warmup Inbox profileTrulyInbox profile last reviewed 2026-08-22; Warmup Inbox last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.