Elva vs FastRouter.ai: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Elva and FastRouter.ai — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Elva

Theneo

Freemium

Reads your repositories to discover every API, scores and governs them, then exposes them to developers and AI agents via hosted MCP servers.

Spec-Free API Discovery: Elva scans repository code directly to find endpoints and generates OpenAPI 3.1 as output, so no existing spec is needed to start.
Endpoint Scoring: Every collection is graded on design, developer experience, AI readiness, security and performance, with the weakest collection surfaced first.
AI Fix Pass: A one-click agent writes missing descriptions from code, types response schemas and documents auth, then rescores the collection.
API Contracts: Per-audience contracts pin the exact endpoints and fields a partner, internal team, public developer or MCP client receives, excluding PII and internal fields.
Breaking Change Enforcement: Each commit is diffed against published contracts, showing the schema diff, affected consumers and tools, and blocking publish by policy.
Hosted MCP Servers: Contracts generate MCP servers hosted behind Elva's gateway with OAuth2, scoped keys, per-tool authorization and exportable call logs.
MCP Playground and Agent Feedback: Test the server with a live model, then read the complaints agents file about confusing or failing tools, scored back into the catalog.
Multi-Target Publishing: One approved contract ships as OpenAPI spec, Theneo docs, MCP server, Postman collection and a typed TypeScript SDK in sync.

API Inventory Audit: Discover undocumented or forgotten endpoints across a large codebase and get a ranked list of what to fix first.
Agent Enablement: Expose an internal service to Claude, Cursor or ChatGPT as a governed MCP server instead of hand-writing tool wrappers.
Partner Integration Safety: Publish a restricted contract to an external partner and have Elva block commits that would break their integration.
PII Scoping: Keep customer emails and internal ops annotations out of a public or agent-facing surface while the same endpoints serve them internally.
Zombie Endpoint Retirement: Prove no active consumer references an endpoint before deleting it, using contract and call-log evidence.
Enterprise Security Review: Satisfy SOC 2, ISO 27001 and GDPR questions and wire agent access into an existing SSO and SCIM identity provider.
Documentation Drift Control: Keep docs, SDKs and Postman collections regenerated from code on every merge instead of maintained by hand.

FastRouter

Freemium

Enterprise LLM gateway that routes, compares and monitors 200+ models through a single OpenAI-compatible API with zero markup.

Unified OpenAI-Compatible API: Access 200+ models for text, image, video, embeddings and speech from one endpoint and swap models without code changes.
Smart Auto Router: Routes each request to the best model based on cost, latency, throughput or output quality.
Automatic Failover: Retries across providers, fallback model lists and virtual model aliases keep applications running during failures.
Cost Control and Governance: Project and API key limits, member roles and access controls prevent spend spikes.
Model Council and Playground: Compare latency, quality and cost side by side and combine models to cross-check outputs.
Observability and Insights: Unified dashboards, activity logs, alerts and weekly Insights that rank cost-saving changes.
Self-Hosting: Run the full gateway in your own cloud so prompts, responses, logs and provider keys stay in your network.

An engineering team replaces several provider SDKs with one OpenAI-compatible endpoint to simplify integration.
A product team cuts LLM spend by routing simple requests to cheaper models and reserving premium models for hard ones.
A platform team keeps a customer-facing app online by defining fallback model lists across providers.
A finance-conscious leader sets per-project and per-key limits to avoid surprise bills.
A regulated enterprise self-hosts the gateway so prompts and provider keys never leave its network.
A developer compares candidate models for latency, quality and cost in the playground before shipping.