Simple, transparent pricing
Start free. Scale when you need to. No surprise charges.
Explorer
Evaluate the API. No credit card required.
100 requests/day · 10/min burst
- Knowledge graph queries (entities, search, relationships)
- ChEMBL database access
- Community support
Researcher
For academic labs and independent researchers.
5,000 requests/day · 60/min burst
- Everything in Explorer
- All 8 database integrations
- Causal inference (intervention, explain)
- Predictions (drug response, essentiality)
- Hypothesis frontier queries
- Email support (48h)
Pro
For biotech teams and clinical decision tools.
50,000 requests/day · 300/min burst
- Everything in Researcher
- Full causal stack (do-calculus, counterfactual)
- Patient interpretation endpoints
- Bulk data download
- Priority email support (24h)
Enterprise
For pharma, hospitals, and health systems.
Unlimited · Custom burst
- Everything in Pro
- Dedicated infrastructure
- Custom SLA (99.9%+ uptime)
- Dedicated support engineer
- Custom data feeds & integrations
- On-premise deployment option
Feature comparison
| Feature | Explorer | Researcher | Pro | Enterprise |
|---|---|---|---|---|
| Rate limit | 100/day | 5,000/day | 50,000/day | Unlimited |
| Burst rate | 10/min | 60/min | 300/min | Custom |
| Knowledge graph queries | ||||
| Entity search | ||||
| ChEMBL database | ||||
| All 8 databases | — | |||
| Causal intervention | — | |||
| Causal explain | — | |||
| Do-calculus | — | — | ||
| Counterfactual queries | — | — | ||
| Predictions | — | |||
| Hypothesis frontier | — | |||
| Patient interpretation | — | — | ||
| Bulk data download | — | — | ||
| Usage overage | Hard cap | $0.005/req | $0.003/req | Negotiated |
| Support | Community | Email (48h) | Email (24h) | Dedicated + SLA |
Frequently asked questions
Yes. The Explorer tier is completely free — no credit card required. You get 100 requests per day with access to knowledge graph queries and ChEMBL data.
Absolutely. The API is designed for both human developers and AI agents. Agent keys use the same tiers. We provide llms.txt, an OpenAPI spec, and machine-readable documentation for autonomous agent discovery.
On the Explorer (free) tier, you hit a hard cap and requests return 429 until the next day. On paid tiers, overage is billed at $0.005/req (Researcher) or $0.003/req (Pro) — so you never lose access.
The Researcher tier at $49/month is already priced for academic budgets. For large lab groups or university-wide access, contact us for institutional pricing.
Researcher includes causal intervention/explain, predictions, and all databases. Pro adds do-calculus, counterfactual queries, patient interpretation endpoints, and bulk data download. Pro also has 10x the rate limit (50K vs 5K requests/day).
Free APIs like PubChem and Open Targets provide entity lookups and basic associations. Galen adds causal inference (do-calculus, counterfactual reasoning), patient-level mutation interpretation, and a unified knowledge graph spanning 28 databases. These capabilities have no free alternative.
Galen's knowledge graph is built from published research databases — it contains no patient data. For the Patient Interpretation endpoints, we process data transiently and do not store patient information. Built with HIPAA-conscious design principles.
Yes. No contracts, no commitments. Cancel anytime and your access continues until the end of your billing period.