Corsair vs FreeAstroAPI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Corsair compared with FreeAstroAPI
Detail	Corsair	FreeAstroAPI
What it does	Open source integration layer for AI agents with secure, multi-tenant support	High-performance astrology API for developers to calculate natal charts, transits, and synastry
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Hobby: $0/mo with up to 50 connections, 100k webhook events, unlimited managed permissions/auth pages, up to 3 team members, and Discord community support. Pro: $200/mo with unlimited connections, unlimited webhook events, unlimited managed permissions/auth pages, unlimited team members, and Slack s	Free: $0 with 80 requests/day. Entry: $8/month with 50,000 requests/month. High: $40/month with 500,000 requests/month. All tiers include hosted MCP access and commercial use allowed.
Key features	OAuth and multi-tenant credential management Permissions system with approval workflows Webhooks and polling for data synchronization Multiple integration connectors Self-hosted and cloud-hosted options Managed authentication pages Agent-safe credential handling API caching per tenant Custom integration scaffolding Community-contributed integrations	Natal chart calculations with planetary positions and house systems Multiple house systems including Placidus, Whole Sign, Koch, Equal, and Regiomontanus Vedic astrology with Kundli, Dasha systems, and Panchang calculations Chinese BaZi (Four Pillars) with Day Master strength and 12 Life Stages Transit timeline and synastry analysis for relationship comparisons Premium text reports with 8,000-9,000 words for monetization Hosted MCP server for AI tool integration and LLM files Geo city search with timezone and location lookup for birth data
What makes it different	Fully open source to avoid vendor lock-in Credentials never stored in Corsair's database Free self-hosted option with no per-seat pricing Handles token refresh and API deprecations automatically Works with or without AI agents	French Ephemeris Professional Licence for highest precision and accurate timezone handling Optimized calculation engine for millisecond response times 99.9% uptime SLA with developer-first support and comprehensive documentation Type-safe JSON responses with consistent data structures for TypeScript integration Support for Western, Vedic, and Chinese astrology systems in single API
Community votes	0	0
DR (Domain Rating by Ahrefs)	34 +1 (up) since last check	31 no change since last check
Trust Flow (Majestic)	8	2
Citation Flow (Majestic)	34	27
Referring domains (Majestic)	203	37

5 details filled in for both companies.

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