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SendHQ

Observable email infrastructure for product teams and AI agents

3.6 AI Infrastructure & Agent Tooling
3.6 Good 3.6
Giving each AI agent its own inbox and identity suits agent-driven products No free tier
Reviewed by Challenging Voice Editorial · Updated Sep 2026 How we rate
PricingFrom $9/mo
Free planNo
CompanyWavicle
PlatformsAPI, Web
CategoryAI Infrastructure & Agent Tooling
Visits2
Last reviewedSep 2026
UpdatedSep 2026
Ask AI about SendHQ ChatGPT Claude Perplexity

Overview

SendHQ is an email API for developers, with one feature aimed squarely at AI products: every product, service or agent can have its own inbox and sending identity. Beyond that it covers the transactional email basics, namely sending and receiving through an API, verifying domains, tracking delivery and bounces, routing inbound mail, and issuing scoped API keys so a single agent's credentials cannot touch everything. Starter costs $9 a month for 10,000 emails across 15 verified domains, and Scale $29 for unlimited email and 200 domains. Marketing plans cost $10 a month more with the same limits. There is no free tier, and the site states a reputation rule plainly: accounts whose bounce or complaint rate stays high are restricted, which protects deliverability for everyone on the platform.

Key features

  • Developer API for sending and receiving transactional email
  • Separate inbox and sending identity per product, service or AI agent
  • Domain verification plus delivery and bounce tracking
  • Inbound mail routing and scoped API keys
  • Starter plan of 10,000 emails and 15 domains for $9 a month

Screenshots & demo

SendHQ screenshot 1

Pricing

SendHQ is a paid tool, with plans that start at $9/mo.

  • Pricing modelPaid
  • Starting priceFrom $9/mo
  • Free planNo
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Pricing is provided as a guide. Check the official site for the latest plans.

Is SendHQ expensive?

SendHQ starts at $9, which is 69% below the AI Infrastructure & Agent Tooling median of $29.48 a month across the 62 priced tools we list in that category.

The cheapest paid option in AI Infrastructure & Agent Tooling starts at $0.2 and the most expensive at $1,250.

54% of AI Infrastructure & Agent Tooling tools in the directory offer a free tier, which this one does not.

Compared against every priced listing in AI Infrastructure & Agent Tooling, recalculated as the catalogue changes. Method and the full market breakdown are in our AI tool pricing study.

Pros & cons

Pros

  • Giving each AI agent its own inbox and identity suits agent-driven products
  • Low entry price for real sending volume
  • Inbound and outbound share one workspace

Cons

  • No free tier
  • Marketing email costs $10 a month more than transactional
  • Accounts with sustained high bounce or complaint rates are restricted

How it compares

ToolRatingFreeFromBest known for
SendHQ (this tool)3.6No$9/moDeveloper API for sending and receiving transactional email
Mails.ai4.0YesFreeEmail API designed for AI agents
mailX3.8YesFreeOne-click SPF, DKIM, DMARC, MX, and blacklist checks
GPT Proto4.0No—200+ models behind one OpenAI-compatible API

Alternatives to SendHQ

4 tools matched to SendHQ on what they do, their category and their price.

Frequently asked questions

What is SendHQ?
SendHQ is an email API for developers, with one feature aimed squarely at AI products: every product, service or agent can have its own inbox and sending identity.
Is SendHQ free?
SendHQ does not offer a free plan; paid pricing starts at $9 per month.
How much does SendHQ cost?
SendHQ starts at $9 per month. See the pricing plans above for full details.
What are the best SendHQ alternatives?
The closest matches in the directory are Mails.ai, mailX, and GPT Proto, compared side by side above.

Reviews

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