AI Tool Atlas

CodingDocumented overviewLast checked Oct 4, 2026

Vezlo: Pricing, Features & Best Use Cases

Open-source AI assistant SDK that turns a codebase into a searchable knowledge base for SaaS apps.

Vezlo homepage screenshot, coding AI tool

Our take: Choose Vezlo if you are a developer who wants an open-source, self-hosted AI assistant grounded in your own codebase and can accept AGPL-3.0 terms or buy a commercial license.

Main limitation: Commercial use needs a separate license

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Who should use Vezlo

Choose Vezlo if you are a developer who wants an open-source, self-hosted AI assistant grounded in your own codebase and can accept AGPL-3.0 terms or buy a commercial license. Based on the vendor's documentation, not on a hands-on test.

Best for: SaaS developers

Also a good fit for

  • Teams wanting an in-app AI assistant over their own codebase

Consider another tool if commercial use needs a separate license

Or if

  • Interactive demo not yet available per site
  • No pricing shown

Vezlo pricing and usage limits

Prices checked Oct 4, 2026 on the official US pricing page. Official pricing ↗ Prices and limits change often.

Free access and trial conditions

Code is open source under AGPL-3.0 for non-commercial use per the site

None stated

Paid plans: what changes as you upgrade

Open source (AGPL-3.0) web

Free source (opens in a new tab)

None

For: Non-commercial or AGPL-compliant projects

Includes

  • Self-hosted SDK components
  • CLI, REST API and MCP server

Usage caps, credits and extra costs

OpenAI embedding usage and your own hosting (e.g. Vercel) per repo docs

Not stated on the official pages

What is Vezlo, and how does it work?

Vezlo is an open-source AI assistant SDK that analyzes a codebase using abstract syntax trees, generates documentation and embeddings, and serves an assistant through a Node.js/TypeScript API server with REST and WebSocket endpoints. The platform is split into several repositories: src-to-kb (knowledge base generator with CLI, REST API and MCP server), assistant-server (RAG backend with Slack integration and human-agent handoff), assistant-client-js, a chat widget and an AI response validator. It is AGPL-3.0 for non-commercial use, with commercial licenses offered.

Vezlo homepage — screenshot of the coding AI tool, Oct 2, 2026
Vezlo's official site: how the product presents itself. vezlo.org, captured Oct 2, 2026

What you provide and what you get back

How Vezlo works: what you provide, where it runs and what you get backYOU PROVIDEYour inputSource code repositoriesOpenAI API key for embeddings (pe…CODINGVezloAPI, CLIfree tier, paid price not publish…free tier availablechecked Oct 4, 2026YOU GET BACKThe resultSearchable code knowledge base wi…Chat answers over REST and WebSoc…input → Vezlo → output · from the vendor's own pages, no hands-on test unless stated
What you give Vezlo and what comes back, from its documentation

You provide

  • Source code repositories
  • OpenAI API key for embeddings (per repo docs)

You get back

  • Searchable code knowledge base with generated docs
  • Chat answers over REST and WebSocket

Where you can use it

Platforms
API, CLI
Account
Not required
Interfaces
CLI, REST API, WebSocket, MCP server
Repos
src-to-kb, assistant-server, assistant-client-js, chat widget, response validator
License
AGPL-3.0 (non-commercial); commercial licenses offered
Runtime
Node.js / TypeScript

Best use cases for Vezlo

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Code knowledge base

Who
SaaS developers
You provide
A code repository
Expected result
A knowledge base with docs and embeddings built from the AST
Plan needed
Open source (AGPL-3.0)
Limitation
Needs OpenAI embeddings per repo docs source (opens in a new tab)

Semantic code search

Who
Engineers onboarding to a codebase
You provide
A natural-language question about the code
Expected result
Relevant code and docs returned by semantic search
Plan needed
Open source (AGPL-3.0)
Limitation
Quality depends on the generated embeddings source (opens in a new tab)

In-app AI assistant

Who
SaaS product teams
You provide
Their codebase plus the chat widget
Expected result
An assistant embedded in the app that answers user questions
Plan needed
Open source (AGPL-3.0)
Limitation
Interactive demo not yet available per the site source (opens in a new tab)

Key features and their practical limits

Vezlo homepage — screenshot of the coding AI tool, Oct 2, 2026
Feature overview on the official site. vezlo.org, captured Oct 2, 2026

AST-based code analysis

Parses source code into an abstract syntax tree so the tool understands functions and structure rather than raw text. Reduces manual work in adding an AI assistant over a codebase.

Access: Per the official site; plan-level availability not statedLimit: Language coverage is not stated on the pages read. source (opens in a new tab)

Auto-generated docs

Writes documentation for the analyzed code automatically as part of the knowledge base build. Reduces manual work in adding an AI assistant over a codebase.

Access: Per the official site; plan-level availability not statedLimit: Generated docs should be reviewed before relying on them. source (opens in a new tab)

Semantic search with embeddings

Creates vector embeddings of code and docs so questions can be matched by meaning instead of keywords. Reduces manual work in adding an AI assistant over a codebase.

Access: Per the official site; plan-level availability not statedLimit: Embeddings use OpenAI per repo docs, so that API is a dependency. source (opens in a new tab)

REST and WebSocket chat server

Runs a Node.js/TypeScript server that exposes the assistant over REST endpoints and live WebSocket chat. Reduces manual work in adding an AI assistant over a codebase.

Access: Per the official site; plan-level availability not statedLimit: You host and operate the server yourself. source (opens in a new tab)

Vezlo: strengths and limits

Where Vezlo is strong

  • Open source (AGPL-3.0 per site) You can inspect, self-host and modify the code, subject to AGPL obligations. documented source (opens in a new tab)
  • REST and WebSocket APIs for the assistant server Other apps can call the assistant without a bespoke integration. documented source (opens in a new tab)
  • Query via CLI, API or MCP server The same knowledge base is reachable from terminals, services and AI clients. documented source (opens in a new tab)
  • Vercel deployment with web-based setup wizard Deployment to Vercel is guided, which shortens first setup. documented source (opens in a new tab)

Limitations to check before paying

How to use Vezlo for adding an AI assistant over a codebase

Set up Vezlo

  1. Clone the src-to-kb repository from the project GitHub organization.
  2. Install dependencies and provide an OpenAI API key for embeddings.
  3. Point the tool at your code repository and run the knowledge base generator.
  4. Deploy the assistant-server (for example on Vercel) and run its setup wizard.

Example: adding an AI assistant over a codebase

  1. Run src-to-kb on a repository to produce docs and embeddings.
  2. Start assistant-server and connect it to the generated knowledge base.
  3. Embed the chat widget or call the REST/WebSocket API from your app.

Review and export the result

  1. Ask a question whose answer you know from the code and compare the reply.
  2. Confirm the answer cites the right files or docs.
Example prompt suggested by our editors (not a recorded output of the product)
How does authentication work in this codebase?

Vezlo API

API access and separate billing

Vezlo has no public API in its official documentation. REST and WebSocket endpoints API documentation ↗

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Code is processed by the components you run; embeddings use OpenAI per repo docs.

Not stated

Not stated; self-hosted storage is under your control

Commercial use and plan restrictions

Requires a separate commercial license; AGPL-3.0 for non-commercial use

AGPL vs commercial license

Best Vezlo alternatives for different needs

"Better suited" is based on documented features and pricing, not on a head-to-head test.

GitHub Copilot: better suited to

Cursor: better suited to

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Explore Vezlo further

Vezlo pricing, plan by planEvery plan with USD prices, limits and what is free.Best Vezlo alternativesTools for the same job, by need and starting price.Best AI coding toolsOur picks in this category, compared by price and free tiers.

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    Vezlo FAQ

    Is Vezlo free?

    The code is open source under AGPL-3.0 for non-commercial use; commercial use needs a separate license whose price is not published. source (opens in a new tab)

    How do I query the knowledge base?

    You can use the CLI, the REST API or the MCP server provided by src-to-kb. source (opens in a new tab)

    Does it need an external AI provider?

    Per the repo docs, embeddings use OpenAI, so an OpenAI API key is needed. source (opens in a new tab)

    Can I embed it in my product?

    Yes, via the chat widget and client JS library, but commercial products need the commercial license. source (opens in a new tab)

    Is there a demo?

    The site says an interactive demo is not yet available. source (opens in a new tab)

    Sources and review methodology

    Official sources and verification dates

    Not verified: Pricing of the commercial license; Supported programming languages; Data retention; Platform beyond API/CLI; Official pages could not be read as text (client-rendered, empty fetch); facts come from the verified seed research.

    How we documented and maintain this page

    Every fact about Vezlo above comes from the 3 official pages listed here, last compared on Oct 4, 2026; we have not run Vezlo ourselves, so it has no editorial score. How we check and re-check pages.

    Article updated Oct 2, 2026; prices checked Oct 4, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error