Compare
Every edge we hold, against the whole field.
A dash means not offered or not documented on the day we looked.
It is not a claim that it cannot be done. Where a competitor is the better choice, its page says so.
Last checked 16 September 2026.
- SendRaven vs ResendThe developer-favourite email API, with inbound, broadcasts and automations, and marketing plans priced by contacts.
- SendRaven vs PostmarkTransactional email with a long deliverability record and mature inbound parsing.
- SendRaven vs MailgunA long-running email API with inbound routes and dedicated IPs; marketing is a separate product.
- SendRaven vs SendGridTwilio's email platform: an Email API sold by volume and Marketing Campaigns sold by contacts.
- SendRaven vs AgentMailInboxes for AI agents: each agent gets its own address, threads and webhooks.
- SendRaven vs LoopsMarketing email for SaaS, priced by subscribed contacts, with transactional included.
- SendRaven vs MailchimpThe marketing email suite, priced by contacts, with transactional as a paid add-on.
| Edge |  | Resend | Postmark | Mailgun | SendGrid | AgentMail | Loops | Mailchimp |
|---|---|---|---|---|---|---|---|---|
| Priced per email sent, never per contactPricing by list size charges most to the customer whose list is growing, which is the point of the product. | transactional by volume; marketing $40–$650/mo by contacts | Email API by volume; Marketing Campaigns by contacts | per inbox and per plan: $20/mo for 10 inboxes and 10,000 emails | by subscribed contacts; sends unlimited | by contacts | |||
| Transactional, campaigns and automations on one planTwo products means two suppression lists that disagree and a price gap that rewards mislabelling campaigns as transactional. | two plans, one dashboard | broadcast stream; no audiences or automations | marketing is Mailjet, a separate product | two products | no campaigns or automations | marketing and transactional together; no inbound | transactional is Mandrill, a paid add-on | |
| The reply is a thread, not a webhookA webhook hands you a raw message and leaves you to work out which conversation it belongs to. | a received-email event; you fetch the message and set reply headers yourself | inbound JSON to a webhook | routes post to a webhook | Inbound Parse posts to a webhook | ||||
| Quoted history stripped from repliesThe third reply in a thread is mostly the first two quoted back. A model reading it pays for that and gets confused by it. | text and html, no stripped field | StrippedTextReply | stripped-text on inbound | extracted_text | ||||
| One query for what is awaiting a replyThis is the poll an agent actually runs. Without it you build a state machine over inbound events. | labels and drafts; no awaiting-reply query documented | |||||||
| Per-key daily cap and recipient allowlistA workspace quota trips after an agent has mailed thousands of people. A key limit trips before. | keys scope to a domain and to send-only; no cap or allowlist | domain sending keys; no cap or allowlist | key permissions; no cap or allowlist | per-key permissions and inbox scope; allow and block lists sit on inboxes, not keys | ||||
| Human approval hold on a keyThe only way to let an agent write mail without letting it send mail. | a key can write drafts it cannot send; a person sends them | |||||||
| Campaign refused before it starts on bounce or complaint rateReputation dashboards report the damage. A gate prevents it. | ||||||||
| Unsubscribe cancels queued sends and ends the sequenceDoing only the first is how a working unsubscribe still delivers day three of a welcome series. | an automation skips its remaining send steps for an unsubscribed contact | not documented | not documented | not documented | no sequences | an unsubscribed contact gets no further campaign or workflow email | not documented | |
| Opt down by topic, per personGiven only all-or-nothing, people press spam instead, and a complaint costs the domain far more than an opt-out. | topics on broadcasts | list-level unsubscribes | unsubscribe groups | mailing lists | groups and preferences | |||
| Remote MCP server with no stored credentialsA server that holds its own database credentials is a shared identity for every caller. | official, local or hosted, covering the whole API | official local server, 24 tools; none reads inbound | official local server | Twilio's official server reads the docs; it does not call the API | official remote server | official remote server | Mandrill only, an official remote server; none for marketing | |
| llms.txt and an unauthenticated OpenAPI documentA model decides what it is holding from the description document. Generated ones say what, not which. | llms.txt; OpenAPI on GitHub | llms.txt; Swagger 2.0 at /swagger/server.yml | llms.txt and OpenAPI 3.1 | a section in Twilio's llms.txt; OpenAPI on GitHub | llms.txt and OpenAPI | llms.txt and OpenAPI | llms.txt | |
| Errors written for an agentA client that backs off on 429 retries a payment problem forever. A model that sees an error retries a held draft. | ||||||||
| Inbound included and freeCharging for the reply discourages the half of email that makes it a conversation. | on all plans; each received email counts against the sending quota | Pro and Platform plans | 1 route free, 5 on Basic, full from Foundation | Inbound Parse on every plan | the core product | Mandrill only, parsed JSON to a webhook | ||
| Free tier that does not expire or throttle by the dayA trial that expires is a deadline, not a tier, and a 100-a-day cap is a tier you cannot test a campaign on. | 3,000/mo, capped at 100 a day | 100 emails a month | 100 a day | 60-day trial, 100 a day | 3 inboxes, 3,000 a month, 100 a day | 1,000 contacts, 4,000 sends, branded footer | 250 contacts, 500 sends a month | |
| Rate per 1,000 past the entry paid tierThe rate past the allowance is the real price for anyone who grows. | $0.90 per 1,000 on Pro | $1.80 per 1,000 on Basic | $1.80 per 1,000 on Basic | tiered, $0.0013 to $0.0005 per email by plan | plan-capped | |||
| Usage pricing without tier cliffsTiers do not hurt at the boundaries. They hurt in the middle, which is where most senders live. | tiers, with pay-as-you-go overage between them | steps by contact count | steps by contact count |
SendRaven- Offered
- Partly, or with a condition
- Not offered, or not documented
Competitor figures are published list prices and public documentation on the date shown.
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