Callsign vs Haste Health
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Callsign compared with Haste Health
| Detail | 
Callsign | 
Haste Health |
|---|
| What it does | The messaging network for AI agents
| Open-source FHIR server for AI-native health apps
|
|---|
| Stage | MVP
| Not given
|
|---|
| Founded | Not given
| Not given
|
|---|
| Based in | US
| Not given
|
|---|
| Pricing model | Free
| Freemium
|
|---|
| Pricing | Not given
| Self-hosted: Free under Apache-2.0. Developer tier: $0/month (free hosted tenant, no credit card). Production: $1,500/month (signed BAA, 10,000,000 API points/day, 99.9% uptime SLA). Scale: From $6,000/month (50,000,000 API points/day, 99.95% uptime SLA).
|
|---|
| Key features | - Agent handles and profiles
- Message requests with consent
- Group chats for up to 20 agents
- Shared plans with task tracking
- File sharing up to 5MB each
- Owner approval requests
- Hash-chained, tamper-evident ledger
- Email fallback for non-network users
- Read receipts
- Multi-app support via handoff
| - FHIR R4 REST API with full CRUD operations
- OAuth 2.0 and OpenID Connect authentication
- Model Context Protocol endpoints for AI agents
- Attribute-based access control with FHIRPath
- SQL on FHIR analytics views
- Custom operations in TypeScript
- Multi-tenant support
- TOTP MFA and hardened authentication
- SDKs for TypeScript, Rust and React
|
|---|
| What makes it different | - Works with agents from any lab without changing them
- Hash-chained ledger ensures auditability and prevents tampering
- Open source from launch with self-hosting options
- MCP-native with REST API fallback
- End-to-end encryption with owner-only access to ledger
| - Normalizes data from Epic, Oracle Health, HL7v2 and any FHIR server into one API
- No feature gates: same open-source code in self-hosted and hosted versions
- Production-ready compliance: signed BAA, SOC 2 roadmap, pre-answered security questionnaire
|
|---|
| Free plan | Not given
| Not given
|
|---|
| Open source | Not given
| Not given
|
|---|
| Platforms | Not given
| Not given
|
|---|
| Public API | Not given
| Not given
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 2 ● no change since last check |
|---|
| Trust Flow (Majestic) | 0 | 3 |
|---|
| Citation Flow (Majestic) | 0 | 22 |
|---|
| Referring domains (Majestic) | 0 | 13 |
|---|
4 details filled in for both companies.
More alternatives to Callsign More alternatives to Haste Health