Shortlist by what you need
Start here if you know why you are leaving SendHQ.
Want the closest match?
Mails.aiMost similar to SendHQ in what it does, its category and its price.
Visit (opens Mails.ai in a new tab)Need a free plan?
Novu ConnectHas a free plan, rated 4.3 out of 5. SendHQ has none.
Visit (opens Novu Connect in a new tab)Want the best rated?
SinchRated 4.1 out of 5 in our review, against 3.6 for SendHQ.
Visit (opens Sinch in a new tab)
At a glance
Green means better than SendHQ, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 SendHQBaseline | 3.6 | $9/mo | No | Observable email infrastructure for product teams and AI agents | |
| Mails.ai | 4.0+0.4 | Free | YesSendHQ has none | Email infrastructure built for AI agents - every inbound message arrives scored for prompt injection and sender reputation. | vs SendHQ |
 mailX | 3.8+0.2 | Free | YesSendHQ has none | Free email deliverability checker that diagnoses SPF, DKIM, DMARC, and blacklist issues in one report. | vs SendHQ |
 GPT Proto | 4.0+0.4 | Not listed | No | 200+ models on one API key, with per-model rates published and cheapest-channel routing. | vs SendHQ |
| Novu Connect | 4.3+0.7 | $30/mo$21 more | YesSendHQ has none | Communication layer that connects AI agents like Claude to Slack, Teams, and email in one thread. | vs SendHQ |
 Bird | 4.0+0.4 | Not listed | No | Developer communications platform (formerly MessageBird) for email, SMS, WhatsApp, Apple Messages and voice, with AI agents and an MCP server for AI-driven operations. | vs SendHQ |
 Stammer | 4.0+0.4 | $197/mo$188 more | No | White-label chat and voice agents an agency resells under its own brand and domain. | vs SendHQ |
| Sinch | 4.1+0.5 | Not listed | No | Communications platform with messaging, voice, email and verification APIs, plus AI features: artificial traffic detection, Smart Conversations with sentiment detection and PII masking, Voice Relay for AI phone calls and an MCP server. | vs SendHQ |
 AI/ML API | 4.1+0.5 | $20/mo$11 more | No | Single OpenAI-compatible endpoint for calling GPT, Claude, Gemini, and 400-plus other AI models. | vs SendHQ |
The alternatives in detail
In order of how closely each one matches SendHQ.
Mails.ai
4.0Free
vs SendHQ+0.4Free plan
Email infrastructure built for AI agents - every inbound message arrives scored for prompt injection and sender reputation.
- Email API designed for AI agents
- Prompt injection scoring on inbound messages
- Sender reputation graph
Injection scoring addresses the most exposed surface agent inboxes have
An injection score raises the floor; it is not a guarantee
mailX
3.8Free
vs SendHQ+0.2Free plan
Free email deliverability checker that diagnoses SPF, DKIM, DMARC, and blacklist issues in one report.
- One-click SPF, DKIM, DMARC, MX, and blacklist checks
- Consolidated deliverability report explaining spam placement causes
- No signup or API key required for web use
Free with no signup barrier for a fast deliverability check
Narrow single-purpose scope rather than a full email marketing or sending platform
GPT Proto
4.0Not listed
vs SendHQ+0.4
200+ models on one API key, with per-model rates published and cheapest-channel routing.
- 200+ models behind one OpenAI-compatible API
- Smart routing to the lowest-cost available channel
- Multi-key budget control with per-key credit caps
Per-key caps make a shared balance survivable for a team
An aggregator sits between you and each provider's terms and uptime
Novu Connect
4.3$30/mo
vs SendHQ$21 more+0.7Free plan
Communication layer that connects AI agents like Claude to Slack, Teams, and email in one thread.
- Unified conversation threading across Slack, Teams, WhatsApp, Telegram, and email
- Identity resolution that keeps a user's cross-channel replies in one thread
- Built on Novu's open-source notification infrastructure (21,000+ GitHub stars)
Solves cross-channel identity and thread-matching, a problem most single-channel bot integrations skip
Requires an existing AI agent to connect, it is infrastructure, not an agent-builder itself
Bird
4.0Not listed
vs SendHQ+0.4
Developer communications platform (formerly MessageBird) for email, SMS, WhatsApp, Apple Messages and voice, with AI agents and an MCP server for AI-driven operations.
- One API for email, SMS, WhatsApp, Apple Messages and voice
- AI agents for WhatsApp business messaging and AI voice for calls
- MCP server giving AI coding agents direct control of the platform
A single platform instead of separate vendors per channel
No flat published pricing; exact rates need a sales conversation
Stammer
4.0$197/mo
vs SendHQ$188 more+0.4
White-label chat and voice agents an agency resells under its own brand and domain.
- Chat agents for web, Instagram, Facebook and WhatsApp
- Voice agents for inbound and outbound calls
- Fully white-labelled dashboard on a custom domain
Usage priced separately, so resellers can set margin knowingly
Per-message costs on stronger models add up quickly at volume
Sinch
4.1Not listed
vs SendHQ+0.5
Communications platform with messaging, voice, email and verification APIs, plus AI features: artificial traffic detection, Smart Conversations with sentiment detection and PII masking, Voice Relay for AI phone calls and an MCP server.
- AIT detection that blocks artificially inflated traffic
- Smart Conversations with sentiment detection and PII masking
- Voice Relay for AI-run phone calls in 160+ languages
Covers SMS, RCS, WhatsApp, voice and email from one provider
No pricing figures on the site
AI/ML API
4.1$20/mo
vs SendHQ$11 more+0.5
Single OpenAI-compatible endpoint for calling GPT, Claude, Gemini, and 400-plus other AI models.
- Single endpoint for 400-plus AI models
- OpenAI SDK-compatible, no code rewrite needed to switch models
- Unified credit-based billing across all providers
One integration covers hundreds of models instead of numerous separate SDKs
No permanent free tier once starter tokens are used
FAQ
Questions people ask
Is SendHQ free?
SendHQ does not list a free plan. Paid plans start from $9/mo.
What is the best free alternative to SendHQ?
Novu Connect is the highest-rated alternative here with a free plan (4.3 out of 5). Other free options: Mails.ai, mailX.
What is the cheapest alternative to SendHQ?
Among paid plans, AI/ML API has the lowest starting price (from $20/mo). If you need it free, start with Novu Connect.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.