aisuite vs Elva: Features, Pricing & Which Is Better (2026)

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

aisuite

Andrew Ng

Free

Open-source Python library giving you one unified Chat Completions API plus an Agents API across all major LLM providers.

Unified Chat Completions API: One OpenAI-style interface for OpenAI, Anthropic, Google, Mistral, Hugging Face, AWS, Cohere, Ollama, OpenRouter, Requesty and more, so switching providers is a one-string change.
Provider-Agnostic Parameters: Standardizes temperature, max_tokens, tools, and other core parameters plus request/response shapes across providers.
Streaming And Async: `stream=True` yields OpenAI-shaped chunks from any supporting provider, and an `acreate` async variant iterates with `async for`.
Agents API: Register real Python functions as tools and run multi-turn tool-use loops on top of the same unified chat client.
Ready-Made Toolkits: Ship-with-the-library toolkits for files, git, and shell so agents can act on the local environment without custom glue.
MCP Server Support: Attach any Model Context Protocol server as a toolkit so agents can use MCP-defined tools alongside native Python functions.
Tool Policies: Govern which tools an agent may call and under what constraints, keeping the agent loop safe and auditable.
Model Router String: `<provider>:<model-name>` naming routes each call to the right SDK with the right parameters, keeping application code portable.

Multi-Provider Prototyping: Compare the same prompt across OpenAI, Anthropic, Google, and Ollama by changing only the model string in one place.
Local + Cloud Hybrid: Run Ollama for private work and cloud providers for heavier tasks through the exact same client and code path.
Building Agentic Apps: Wire domain Python functions in as tools and let aisuite handle the multi-turn tool-calling loop across whichever LLM you choose.
MCP Integration: Point an aisuite agent at an existing MCP server (filesystem, GitHub, Slack, etc.) and expose those tools to any supported model.
Vendor-Portable Products: Ship a product that lets end users choose their LLM provider without maintaining a separate SDK integration for each one.

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.