TrulyInbox vs Warmup Inbox
Both warm inboxes to lift deliverability, but they price it differently: TrulyInbox is flat and unlimited-inbox, Warmup Inbox is per inbox with per-ESP networks. Here is how they compare on pricing, networks, free tools, reporting, and reviews.
By Rahul Bageria, co-founder · Updated June 2026
Same job, different pricing model
Both warm inboxes to lift deliverability. They split on how they price it and what they bundle around it.
One flat price covers unlimited sending inboxes, so cost is set by your daily warmup volume, not your mailbox count. Built for teams running big fleets on a budget.
Priced per inbox, with per-ESP networks that target Google and Outlook traffic, plus free DMARC and SPF tools. Built for a smaller set of high-value inboxes.
- ✓You warm many inboxes and want one flat price
- ✓You run an agency or large sending fleet on a budget
- ✓You do not want to pay per mailbox as you scale
- ✓You watch a few high-value inboxes closely
- ✓You want per-ESP networks for Google and Outlook
- ✓You value free DMARC and SPF deliverability tools
Short on time? We'll tell you which fits your fleet.
What each tool actually is
TrulyInbox
An email warmup platform with flat pricing that covers unlimited sending inboxes. It warms Gmail, Outlook, and any SMTP mailbox through a real-account network, with a deliverability score and ESP-level placement reporting, plus a suite of free email tools. Best for agencies and teams warming many inboxes who want one flat price, not a per-mailbox bill.
Visit TrulyInboxWarmup Inbox
A warmup-focused tool priced per inbox. It runs warmup through per-ESP networks that target Google and Outlook traffic, with a reputation score, community benchmark, and blacklist alerts, plus free DMARC and SPF tools and a blacklist checker. Best for individuals and small teams warming a handful of high-value inboxes they watch closely.
Visit Warmup InboxTrulyInbox vs Warmup Inbox, side by side
The facts that decide it, verified from each tool's official site in June 2026.
| Dimension | TrulyInbox | Warmup Inbox |
|---|---|---|
| Best for | Teams warming many inboxes on a budget | A few high-value inboxes, watched closely |
| Pricing model | Flat, unlimited inboxes | Per inbox |
| Unlimited inboxes option | Yes, on all paid plans | No, priced per mailbox |
| Per-ESP networks | Distribution settings (Google/Microsoft/Others) | Yes, ESP warmup (Google/Outlook) |
| Warmup network | Real-account network | Real-inbox network, per ESP |
| Free deliverability tools | DMARC, SPF, DKIM, spam checker | DMARC, SPF, blacklist checker |
| Placement reporting | Deliverability score, ESP-level placement | Reputation score, community benchmark, alerts |
| Entry price | $29/mo flat (Free plan available) | $19 per inbox a month |
| Free trial / plan | 7-day trial plus a free plan | 7-day trial |
| API | Yes, from Starter | Yes, on all plans |
Both are priced in USD. Numbers verified June 2026, confirm the current plan on TrulyInbox and Warmup Inbox before you buy.
What each one can and cannot do
A capability check, scored the same way for both tools.
| Capability | TrulyInbox | Warmup Inbox |
|---|---|---|
| Gmail / Google warmup | ✓ | ✓ |
| Outlook / Microsoft warmup | ✓ | ✓ |
| Any-SMTP / IMAP warmup | ✓ | ✓ |
| Unlimited inboxes option | ✓ all paid plans | ✕ per inbox |
| Per-ESP networks | Distribution settings | ✓ Pro+ |
| Daily volume ramp control | ✓ Growth+ | ✓ Pro+ |
| Placement / deliverability reports | ✓ ESP-level | ✓ benchmark |
| Spam test | ✓ | ✓ |
| Free DMARC / SPF tools | ✓ + DKIM | ✓ + blacklist checker |
| API | ✓ from Starter | ✓ all plans |
| Team / agency features | ✓ multi-inbox table | Standard dashboard |
| Free trial / plan | ✓ trial + free plan | ✓ 7-day trial |
"Distribution settings" means TrulyInbox spreads warmup across providers from one pool rather than running separate per-ESP networks. "Standard dashboard" means multi-inbox management without a dedicated agency tier.
What real users say
Public review scores and the themes that come up most, checked June 2026. Counts drift, so the live links are the source of truth.
TrulyInbox
Praised for: easy setup, an intuitive dashboard for tracking many mailboxes, and strong value against per-inbox tools.
Watch-outs: a younger review base, plus a minority of reports about support responsiveness and occasional deliverability inconsistency.
Warmup Inbox
Praised for: fast, responsive human support, simple setup, and real deliverability gains within the first weeks.
Watch-outs: per-inbox pricing that climbs at scale, and default settings that can run too aggressive for brand-new domains.
Read the scores in context. Both tools sit on mid-sized review samples, and Warmup Inbox scores a little higher across them. Weigh the themes and the sample size alongside the average, not just the number on its own.
Where each one actually wins
Six things separate these tools in practice. Here is the honest call on each.
Pricing model for many inboxes
Edge: TrulyInboxThis is the deciding issue for most teams choosing between these two. TrulyInbox charges one flat price for unlimited inboxes, so warming a fleet costs the same as warming a few, set only by your daily volume tier. Warmup Inbox charges per inbox, so its bill rises with each mailbox. Once you run more than a couple of inboxes, TrulyInbox is far cheaper, and at a large fleet it is not close.
Per-ESP network targeting
Edge: Warmup InboxWarmup Inbox runs warmup through per-ESP networks on its higher plans, targeting Google and Outlook traffic specifically, which is finer control than most tools offer. TrulyInbox spreads warmup across providers from one pool using configurable distribution settings (Google, Microsoft, Others), which is flexible but not the same as separate per-ESP networks.
Free deliverability tools
Edge: Warmup InboxBoth ship free utilities, but Warmup Inbox's set is stronger for deliverability work: free DMARC and SPF generators plus a blacklist checker that queries more than 100 DNSBLs. TrulyInbox offers DMARC, SPF, and DKIM generators, a spam checker, and a header analyzer. If you live in deliverability tooling, Warmup Inbox gives you more for free.
Reporting and placement insight
Edge: splitTrulyInbox reports a deliverability score with ESP-level placement breakdowns and 90-day history, which is useful when you manage many mailboxes. Warmup Inbox reports a reputation score against a community benchmark, with score-drop and blacklist alerts. One leans toward placement detail, the other toward reputation and alerting, so the better fit depends on what you watch.
Ease for agencies running fleets
Edge: TrulyInboxTrulyInbox pairs flat pricing with a spreadsheet-style table for managing hundreds of inboxes with filters and sorting, plus a dedicated account manager on higher tiers. Warmup Inbox uses a standard multi-inbox dashboard with no separate agency tier, since per-inbox pricing is its scaling model. For an agency warming many mailboxes, TrulyInbox fits the workflow and the wallet.
Warmup quality and network
Edge: tieBoth warm through large networks of real accounts and both lift deliverability in practice, so neither has a clear edge on raw warmup. The honest caveat applies to both: pool-based warmup is increasingly detectable, and Warmup Inbox's own reports of default settings running too hot on new domains are a live symptom. Ramp gently and watch real placement on either tool.
Want the right one picked for your fleet?
We run warmup inside live campaigns. Tell us your inbox count and we'll call it.
What each one costs in 2026
Verified from each official pricing page in June 2026. Read the seat model, not just the headline number.
TrulyInbox
USD / flat, unlimited inboxes- Free
1 inbox, 10 warmup emails a day$0 - Starter
200 warmup emails a day, unlimited inboxes$29/mo - Growth
1,000 warmup emails a day, unlimited inboxes$99/mo
Annual billing lowers these. Higher tiers add Scale at $199/mo (3,000 a day) and Scale Plus from about $407/mo for larger volume. A 7-day trial and a free plan are available.
Warmup Inbox
USD / per inbox- Basic
75 warmup emails a day, per inbox$19/mo - Pro
250 a day, per-ESP networks, per inbox$59/mo - Max
Up to 1,000 a day, per inbox$99/mo
Prices are per inbox a month. Annual billing saves about 20%. Free DMARC and SPF tools are included, and warmup runs through per-ESP networks.
True cost at scale. Warmup is priced per inbox or flat, so cost tracks the size of your sending fleet, not your contact volume. The two models cross over almost immediately: past a couple of inboxes TrulyInbox's flat unlimited plans are far cheaper for big fleets, while Warmup Inbox's per-inbox pricing and free deliverability tools fit a few high-value inboxes you watch closely. Model warmup as inboxes times the rate before you pick.
What neither tool does well
Both are warmup tools, so they share the same blind spots. Worth knowing before you expect either to carry your whole motion.
Pool-based warmup signatures are increasingly detectable, so warmup helps but no longer guarantees the inbox. The category is drifting toward placement testing.
Neither finds or times the accounts that are in-market right now. That is targeting, a different job from warming an inbox.
Neither sends your outreach. Warmup readies the inbox, so you still need a dedicated sender on top to run the actual campaigns.
Need the sender that runs your campaigns? See our best cold email tools for 2026. Want the right accounts found and timed for you? That is the signal-based outbound we run.
Our take, after running both
The choice is mostly about how many inboxes you warm, not a feature count. Here is how we'd call it in three situations.
Flat, unlimited-inbox pricing and a multi-inbox table keep a big fleet cheap and manageable, where per-inbox pricing would balloon.
Per-ESP networks for Google and Outlook, plus free DMARC, SPF, and blacklist tools, fit a small set of high-value inboxes you watch closely.
Warmup is a baseline, not a guarantee. Pair either tool with deliverability monitoring and watch where your real emails actually land.
Not sure which fits? We run signal-based outbound for early-stage teams and will tell you straight.
Book a Fit Check
Co-founder of Real Good GTM. He has been the first business hire and Chief of Staff across seed and pre-seed B2B startups like Palm.ai and Cef.ai, building sales engines from nothing, with a strategy foundation from AWS and Accenture. This comparison comes from running these tools on live campaigns, not from a spec sheet.
Connect on LinkedInQuestions buyers ask
Is TrulyInbox better than Warmup Inbox?
Does TrulyInbox really offer unlimited inboxes?
Which is cheaper, TrulyInbox or Warmup Inbox?
Do TrulyInbox and Warmup Inbox warm up Outlook and Gmail?
Is email warmup still worth it in 2026?
Which has better reviews, TrulyInbox or Warmup Inbox?
Do TrulyInbox or Warmup Inbox send cold emails?
More from Real Good GTM
Best cold email tools 2026
The 12 senders worth running, ranked by job.
Signal-based outbound
Outbound triggered by real buying signals, not job titles.
The 60-day plan
What actually happens when we run your outbound.
The two of us
Who runs your account, and why founder-led matters.
Not sure which fits your motion?
Book a fit check. We'll look at your channels, your market, and how you sell today, and tell you straight which tool, or which stack, actually fits.
Book a Fit CheckNo hard sell. No fake numbers. Real good work speaks for itself.