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>log in to commentI started Hail while building AI agents in 2025 for industrial and logistics companies. I kept spending time connecting carriers, finding phone numbers in the right country, and submitting ID or company documents over and over. With Hail, start by connecting via MCP, then describe the assistant you need. It works inbound and outbound, on all 3 channels: email, text, and phone call. Short list of what's possible: * Get numbers in 120+ countries and submit required documents, for example 10DLC texting in the US. * Send emails and track delivery/opens/clicks with custom domain included for free. * Full context of communication shared between calls, text, and emails. * Hand calls over to a person. * Top up credit, with no subscription. If the objective is to get up and running with AI communication in a very short time, without expensive subscriptions, and with a broad set of capabilities and coverage, then Hail.so is a good solution.
- Supports voice, SMS, and email via a single API
- Built for clear, respectful and safe communication
Hail provides a single API for AI assistants to make/receive calls, send/receive SMS, and send/receive email.
- for
- Developers building AI agents or apps that need voice, SMS, and email communication.
- pricing
- paid
- license
- AGPL-3.0
- v0.29.0hail CLI v0.29.013 hours ago
- v0.28.0hail CLI v0.28.02 days ago
- v0.27.0hail CLI v0.27.07 days ago
Key features
- Voice calls — Make and receive phone calls with selectable voices and get transcripts.
- SMS messaging — Send and receive SMS worldwide, with per-message pricing.
- Email handling — Send and receive email, use a custom domain or the default hail.so address.
- Global phone numbers — Rent local numbers in 120+ countries starting at $0.50-$2 per month.
- Single API key — One key works for calls, SMS, and email via REST, CLI, or Python SDK.
- Prepaid usage — Add credit and pay only for minutes, texts, or emails you actually use.
- Open-source option — Self-host the service by using the source code on GitHub.
- Assistant integrations — Connect to Claude, ChatGPT, Gemini CLI, Cursor, VS Code and other AI assistants.
Use cases
- Add outbound and inbound phone support to an AI-powered customer service bot.
- Send automated launch checklists via SMS and email from an AI planning assistant.
- Enable an AI agent to schedule appointments by calling users and confirming details.
- Build a voice-enabled chatbot that can place calls, read transcripts, and follow up via text.
Hail Communication for AI vs alternatives
 Hail Communication for AI |  Vonage |  Postmark |  Postman | ||
|---|---|---|---|---|---|
| Best for | Unified communications API for AI agents | General communications APIs | Email API | Transactional email | API development workflow |
| Pricing | Paid | Subscription | Subscription | Subscription | Subscription |
| DevHunt upvotes | 1 | 0 | 0 | 0 | 0 |
| Launched | Oct 2026 | — | — | — | — |
- Hail Communication for AI vs Vonage: Vonage offers similar voice, SMS, and video APIs but is not focused on AI-assistant integration.
- Hail Communication for AI vs Resend: Resend provides only email sending APIs, lacking voice and SMS capabilities.
- Hail Communication for AI vs Postmark: Postmark specializes in transactional email delivery, no voice or SMS support.
- Hail Communication for AI vs Postman: Postman is an API design and testing platform, not a communications service.
Hail Communication for AI FAQ
Is there a subscription?+
No. Hail is prepaid; you add credit and spend it on calls, texts, and email.
What does the $0.10 per minute include?+
It covers the phone connection, voice synthesis, transcription, and the language model.
How are SMS messages billed?+
A US text costs $0.018, Canada $0.035, and other countries $0.20 per 160-character message.
What are the costs for email?+
Email is $1 per 1,000 messages, the same price for sending and receiving.
Do I pay extra for a phone number?+
Numbers are rented at carrier cost, starting at $0.50 / month for calls or $1 / month for calls + texts.
Can I self-host Hail?+
Yes, the source code is available on GitHub for self-hosting.
Summarized by DevHunt from hail.so · Oct 20, 2026. Details may change; check the official site.
