Sub2API vs OpenRouter
OpenRouter is a commercial service that provides unified API access to hundreds of AI models at per-token billing. Both Sub2API and OpenRouter expose an OpenAI-compatible API endpoint, but they serve fundamentally different deployment models.
| Feature | Sub2API | OpenRouter |
|---|
| License | LGPL-3.0 (self-hosted) | Proprietary (managed) |
| Self-hosting | Yes (Docker, PostgreSQL, Redis) | No |
| Billing model | Flat subscription sharing | Per-token billing |
| Provider support | Claude, OpenAI, Gemini, Grok | 200+ models across providers |
| Setup complexity | Moderate (three-service stack) | None (API key only) |
| ToS compliance | At risk (see README warning) | Uses official provider APIs |
Sub2API is the stronger choice when you already hold AI subscriptions and want to avoid adding per-token costs on top of them. At high usage volumes, per-token billing from commercial aggregators scales sharply; a flat subscription routed through Sub2API keeps costs fixed. Self-hosting also means the relay layer adds no third-party data exposure beyond the upstream AI providers.
OpenRouter is the better choice when you need access to a wider model catalog beyond the four providers Sub2API supports, when ToS compliance is non-negotiable, or when your team lacks the infrastructure to run PostgreSQL and Redis. OpenRouter also provides production SLAs and automatic failover that a self-hosted relay does not guarantee out of the box.
Sub2API vs Direct Provider APIs
Using each provider's official API (Anthropic API, OpenAI API, Google AI API) is the baseline alternative. Direct API access uses official per-token pricing and is fully compliant with each provider's terms.
| Feature | Sub2API | Direct Provider APIs |
|---|
| Billing | Subscription-based (shared) | Per-token |
| ToS compliance | At risk | Fully compliant |
| Multi-provider | Yes (one endpoint) | No (separate keys per provider) |
| Self-hosting | Yes | No (managed service) |
| Setup | Three-service relay stack | API key configuration only |
Direct provider APIs are the right choice for any production or commercial application where ToS compliance is a hard requirement, or where usage volume is low enough that per-token pricing is already affordable. Sub2API is relevant for individual developers or teams who are already paying for subscriptions and want to route high-volume development tool usage through that existing spend, with the understanding that account risk is borne entirely by the user.
