warmbly review 78/100 on verified data
warmbly is a newsletter platform: Open-source cold email platform that warms up mailboxes, sends campaign sequences and gathers replies in one inbox, with a built-in CRM.
Data checked Oct 14, 2026 against the vendors' own pages. How we verify
- Score (rank 14 of 27)
- 78/100
- Coverage (5 of 8 criteria)
- 75%
- From, per month
- $23
- Free plan
- Yes
Paid plans start at $23 per month billed yearly on the Starter plan, and there is a free plan.
warmbly has a public API.
In our newsletter platforms ranking warmbly scores 78/100, rank 14 of 27, based on 5 of 8 criteria (75% of the scorecard weight backed by verified data).
warmbly at a glance
- Pricing model
- Free plan + paid plans source, Oct 14, 2026
- Cheapest paid plan
- Starter: $23/mo (billed yearly) source, Oct 14, 2026
- Free plan
- Yes source, Oct 14, 2026
- Free trial
- No source, Oct 14, 2026
- Public API
- Yes source, Oct 14, 2026
- Open-source licence (GitHub)
- Apache-2.0 source, Oct 14, 2026
- GitHub stars
- 431 source, Oct 14, 2026
- Self-hosting
- Stated by the vendor source, Oct 14, 2026
warmbly plans
Starter
$23per month, billed yearly
- Billed monthly
- Not offered
- Billed yearly
- $23
- Charged per
- per workspace
Published limits
None statedGrow
$71per month, billed yearly
- Billed monthly
- Not offered
- Billed yearly
- $71
- Charged per
- per workspace
Published limits
None statedBusiness
$263per month, billed yearly
- Billed monthly
- Not offered
- Billed yearly
- $263
- Charged per
- per workspace
Published limits
None statedEnterprise
Contact sales
- Billed monthly
- Contact sales
- Billed yearly
- Contact sales
- Charged per
- Not stated
Published limits
None stated
Prices in USD per month, before tax. Read from the vendor's pricing page on Oct 14, 2026. "Not stated" means the page does not publish it.
Full warmbly pricing and plan limitsHow warmbly scores
Score
78/100
Rank #14 of 27
Coverage 75%
5 of 8 criteria. Ranked at 60% or more.
Entry price
67/100
Weight 33%$23/month billed annually on Starter; no monthly-billed price published (scored against annual-billed prices) source
Free plan or trial
100/100
Weight 20%Free plan source
Pricing transparency
80/100
Weight 13%3 of 4 plans have a public price (1 "contact sales") source
Verified features
60/100
Weight 20%3 of 9 tracked features verified: automations / sequences, a/b testing, open and click analytics source
API, integrations and export
100/100
Weight 13%public API source
Cost at 1,000 subscriberscategory criterion
Excluded
Weight –No published data: left out, the other criteria are re-weighted.
Free plan limitscategory criterion
Excluded
Weight –No published data: left out, the other criteria are re-weighted.
Paid subscriptionscategory criterion
Excluded
Weight –No published data: left out, the other criteria are re-weighted.
warmbly features
- Automations / sequences
- Yes source, Oct 14, 2026
- A/B testing
- Yes source, Oct 14, 2026
- Open and click analytics
- Yes source, Oct 14, 2026
9 more details we track are not published by the vendor or not verified yet (shown as – in tables). How we verify
warmbly alternatives
| # | Tool | Score | Coverage | From, billed monthly | From, billed yearly | Free plan | Integrations | Public API | Checked |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  Flodesk | 98/100 | 75%5 of 8 criteria | Free | Free | Yes | – | Yes | Oct 14, 2026 |
| 2 |  Sender | 98/100 | 85%6 of 8 criteria | Not offered | $9/mo | Yes, 2,500 subscribers | – | Yes | Oct 14, 2026 |
| 3 |  Brevo | 98/100 | 75%5 of 8 criteria | $9/mo | Not offered | Yes | 150 | Yes | Oct 14, 2026 |
| 4 |  notifuse | 93/100 | 85%6 of 8 criteria | $16/mo | $24.17/mo | Yes, unlimited emails per month | – | Yes | Oct 14, 2026 |
| 5 |  EmailOctopus | 92/100 | 85%6 of 8 criteria | Not offered | $9/mo | Yes, 2,500 subscribers | 1,000 | Yes | Oct 14, 2026 |
Each value links the vendor page it was read from (hover for the check date). Coverage is the share of the scorecard's weight with verified data, and "N of M criteria" how many criteria the score is based on; a tool is ranked at 60% or more.
All 34 warmbly alternatives, rankedMore ways to weigh up warmbly
Compare warmbly
Questions, answered from the data
How much does warmbly cost?
Paid plans start at $23 per month billed yearly on the Starter plan, according to warmbly's pricing page (checked Oct 14, 2026).
Does warmbly have a free plan?
Yes: warmbly has a free plan (checked Oct 14, 2026).
Does warmbly have an API?
Yes, a public API is documented (checked Oct 14, 2026).
How does warmbly score?
In our newsletter platforms ranking warmbly scores 78/100, rank 14 of 27, based on 5 of 8 criteria (75% of the scorecard weight backed by verified data).
What are the best warmbly alternatives?
By our scorecard the top-ranked alternatives are Flodesk (98/100), Sender (98/100) and Brevo (98/100).
More on warmbly
Pricing last read Oct 14, 2026. Vendors change prices; the linked page is the final word.