One endpoint gives any agent its own phone number, SMS line, and email inbox — inbound and outbound. Real-world communication, as standard tool calls.
Already in your stack. One click away.
Pick your client. Approve the consent screen. Your agent gets call / sms / mail tools. No API keys, no install.
Your agent can think. It can't call, text, or email.
LLMs are trapped in chat. The moment your agent needs to reach a real person, the work stops — or you spend six weeks wiring carriers, then six more keeping it alive.
Without Hail. With Hail.
■ 01 / Build vs. plug-inThree channels. One API.
■ 01 / Communication as tool callsCall.
Place and receive real calls on a real number. Streaming transcripts, turn detection, voicemail — as structured events.
Text.
Send and receive text on the same number. 10DLC, opt-outs, carrier filtering — all handled for you.
Email.
Two-way email on you.hail.so, or your own domain. Threaded, searchable, attachments parsed into clean content.
Watch the wire.
■ hail tail --follow · all channelsCalls, SMS, and email land in the same feed — your terminal, the console, or the SDK's event stream. Same data, same shape.
Built for agents that do things.
■ 03 / Use casesSupport lines
Answer 24/7, resolve L1 end-to-end, escalate to a human with full context.
Book & rebook
Call offices and vendors, confirm by text, drop the result into the calendar.
Outreach
Dial warm leads, text follow-ups, hand hot prospects to a human. Logged to CRM.
Concierge
A number users text "book a table for two at 8" — the agent calls and confirms.
Self-host it. Or let us run it.
■ 04 / How to get itSelf-host.
Open source, AGPL. Runs anywhere Docker runs. Bring your own carrier and domain.
Managed.
Every channel on one platform, one key, and one invoice — instead of Twilio, a mail vendor, and carrier accounts. Pay-as-you-go, so there's practically zero risk to start.
Boring about compliance.
Developers are responsible for obtaining lawful consent from their own recipients. Hail provides the infrastructure and enforcement tooling — not a substitute for that consent.
Your agents, on every channel.
Hosted phone numbers, two-way SMS and email, carrier registration, dashboard. Sign up in 30 seconds — free credit to start, no card.