head to head
Warmy vs MailReach
Warmup trial and reputation workflow versus published per-mailbox pricing and bundled spam tests.
What matters for teams building autonomous agents
An agent stack treats email as a two-way primitive. Inbound has to arrive as structured JSON a tool call can consume, sends have to be safe to retry when a model loop repeats itself, and every action needs an audit trail. A provider without inbound parsing only solves half the problem.
| Priority | Warmy | MailReach |
|---|---|---|
| Inbound parsing | No | No |
| Idempotency keys | No | No |
| Webhooks | No | Yes |
| Operating since | Not published | Not published |
| Event stream | Yes | Yes |
| Best published rate per 1,000 | Tiers not published in comparable form | Tiers not published in comparable form |
| Batch sending | No | No |
| SDKs | None | None |
| Multi-tenant | Yes | Yes |
For an agent that reads and writes email running inbound parsing into tool calls and model-generated sends that must not duplicate, MailReach takes every priority that separates them here (webhook coverage), while Warmy matches it on the rest. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Warmy | MailReach |
|---|---|---|
| Webhooks | No | Yes |
| SDKs | None | None |
| Multi-tenant | Yes | Yes |
| Tagline | Email warmup and deliverability monitoring for sender reputation. | Email warmup plus spam testing for outbound teams. |
| Free tier | 7-day trial, no credit card, 1 mailbox, 15 to 50 seed emails/day | No permanent free plan published |
| Starts at | Paid plan pricing is not exposed in accessible official pricing docs | $19.50/mailbox/mo shown in the published pricing calculator |
| Pricing model | tiered | tiered |
| API | No | No |
| SMTP | No | No |
| Templates | none | none |
| React Email | No | No |
| Inbound | No | No |
| Idempotency | No | No |
| Dedicated IP | No | No |
| Deliverability | Not a sender. Warmup tools can create positive engagement signals, but they do not fix poor consent, bad lists, weak authentication, or irrelevant content. | Not a sender. Helps monitor mailbox reputation, warmup behavior, blacklist status, SPF, DKIM, DMARC, and inbox placement test results. |
| DX score | 6/10 | 7/10 |
| Best for | Outbound teams evaluating a warmup workflow before scaling sender accounts. | B2B outbound teams that want warmup, spam testing, and reputation tracking in one product. |
Warmy
pros
- ›Official trial does not require a credit card
- ›Trial includes the core warmup flow for one mailbox
- ›Useful for testing whether a warmup workflow fits an outbound team
cons
- ›Paid pricing was not visible in accessible official pricing docs
- ›Warmup effectiveness is debated among deliverability practitioners
- ›Does not replace authentication, list hygiene, or consent quality
MailReach
pros
- ›Warmup and spam testing are bundled
- ›Works with common mailbox and ESP setups that support SMTP
- ›Includes domain and inbox health checks
- ›Agency pricing path exists
cons
- ›No permanent free plan is published
- ›Per-mailbox pricing can scale quickly for outreach teams
- ›Warmup does not fix poor targeting or bad list acquisition