Open-Source CodeComplete Alternatives: Self-Hosted AI Coding Assistants That Keep Your Code Private
CodeComplete AI promised companies a private version of GitHub Copilot: an AI coding assistant that runs on your own servers and learns from your own codebase, so no source code goes to an outside AI provider. That product is gone. Its maker no longer offers it, and in November 2026 codecomplete.ai showed only a website-builder "Launching Soon" page. The good news is that the idea behind it, a coding assistant you host yourself, is now well served by open-source software. This guide lists the open-source tools that let a startup or a larger team keep code in-house, with the licence, latest release and deployment model of each, checked on its GitHub repository and official pages on 13 November 2026.
Quick answer: the closest open-source replacement for CodeComplete is Tabby, a self-hosted completion and chat server for a whole team. Refact is the one that still talks about fine-tuning on your codebase and on-premise deployment. For VS Code with nothing leaving your network, use Twinny or llama.vscode. For coding agents rather than autocomplete, use Cline or Kilo Code with a local model, or OpenHands on your own servers. For a general list built around local models versus your own API key, see our open-source GitHub Copilot alternatives.
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What Happened to CodeComplete AI?
CodeComplete was built by Lynx, a company from Y Combinator's Winter 2023 batch. Its launch post on Y Combinator called it "GitHub Copilot for Enterprise": large companies that could not send code to GitHub, Microsoft and OpenAI would get code models deployed on-premises or in their own cloud and trained on their own codebase. Today Lynx's Y Combinator profile marks the company as inactive and describes a different product, an AI platform for investigating engineering incidents. On 13 November 2026 codecomplete.ai showed a generic "Launching Soon" template page, its pricing page returned an error, and there was no product to sign up for. If you used CodeComplete or found it in an older list, plan on moving to one of the tools below.
Open-Source CodeComplete Alternatives Compared
Sources: each project's GitHub repository (licence file, latest release) and official site or pricing page, default view, checked 13 November 2026.
Self-Hosting an AI Coding Assistant: What to Decide First
CodeComplete sold one package: the software, the model, the hosting and the fine-tuning. With open source you put that package together yourself, so make three choices before you pick a tool:
- One server for the team, or a model on every laptop? A team server (Tabby, a Twinny gateway, OpenHands on a VM) needs one good GPU machine and gives everyone the same models. Local models on each laptop need no server, but every developer needs strong hardware.
- Fully local, or your own API keys? Most agents on this list can also use cloud models with your own keys (BYOK). That is cheaper than a seat licence but sends code to the model provider, which is exactly what CodeComplete's customers wanted to avoid. For strict privacy, allow only local providers.
- How big a model can you run? llama.vscode's README gives a simple guide for code completion: a 1.5B Qwen model under 8 GB of video memory, 3B under 16 GB, 7B above 16 GB and a 30B model above 64 GB. Agents need larger models than autocomplete does.
Fine-tuning on your own code, CodeComplete's main selling point, is the hardest part to replace. Most tools now use retrieval instead: they index your repositories and pass the relevant code to the model with each request. Refact is the only tool here whose homepage still offers fine-tuning on your codebase.
The Best Open-Source CodeComplete Alternatives in 2027
1. Tabby: a self-hosted Copilot server for the whole team
Tabby is the closest match to what CodeComplete sold. Its GitHub repository describes it as a self-hosted AI coding assistant and an open-source, on-premises alternative to GitHub Copilot: it is self-contained, with no database or cloud service needed, offers an OpenAPI interface and supports consumer-grade GPUs. Developers connect through IDE extensions, and the server adds an Answer Engine, inline chat and context providers that bring in your repositories. The code is Apache-2.0, except an enterprise folder under its own licence. According to its pricing page, the Community plan is free and open source for up to 5 users with local deployment, Team costs $19 per seat a month for up to 50 users, and Enterprise is priced on request. One caution: the latest release, v0.32.0, dates from January 2026 and the last code push from June 2026, so check the project's activity before you build on it.
2. Refact: the one that still offers fine-tuning and on-premise deployment
Refact is a BSD-3-Clause AI coding assistant with an agent, chat and code completion for VS Code and JetBrains. Its homepage promises what CodeComplete promised: fine-tune it to your codebase, deploy on-premise and stay in full control of your data. There has been a big change, though. The company's April 2026 announcement retired the hosted Refact Cloud (accounts, credits, managed inference and team features) and said Refact continues as an open-source, community-maintained project that works with a local Refact engine, your own API keys and local models through Ollama, LM Studio or vLLM. The original repository is now an archive, and its README says development moved to the JegernOUTT/refact fork, which released v8.6.4 in September 2026.
3. Twinny: VS Code completion that stays inside your network
Twinny is an MIT-licensed VS Code extension for code completion, inline edits, chat and code review. It has no telemetry and needs no account, and it sends requests only to the model server you set: Ollama, LM Studio, llama.cpp or another OpenAI-compatible server on your machine, or a hosted API if you choose one. For teams, its repository includes twinny-server, a gateway that runs on the machine with the models and serves every developer's VS Code, so prompts go only to your gateway and your backend. The gateway is free for five developers and costs $15 a seat a month after that; SSO, team policy and plugins need a paid licence. Version 4.0.20 came out in September 2026.
4. llama.vscode: fully local completion from the llama.cpp team
llama.vscode is an MIT-licensed VS Code extension from ggml-org, the organisation behind llama.cpp. It gives Tab-accepted code suggestions, chat and an agent for coding, with models running on your own machine through llama.cpp, which the extension can now install for you on macOS and Windows. Its README recommends a completion model by hardware, from a 1.5B Qwen model on less than 8 GB of video memory to a 30B model on more than 64 GB. It is the most direct route to private autocomplete for a single developer, and it is actively developed: v0.0.77 came out on 5 November 2026.
5. Cline: an open-source coding agent with an enterprise option
Cline is an Apache-2.0 coding agent for VS Code, the terminal and now a desktop app aimed at open-weight models. It plans changes, edits files and runs commands with your approval, and it works with local models through Ollama or LM Studio as well as with your own keys for cloud providers. According to its pricing page, the open-source version is free for individual developers, who pay only for AI inference, and the FAQ says you can switch providers or self-host at any time. Cline Enterprise, priced on request, adds the JetBrains extension, SSO, role-based access control, audit logs and VPC deployments, which is the closest thing on this list to CodeComplete's enterprise package. Version 4.1.26 came out in October 2026.
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6. Kilo Code: agent and autocomplete with a private gateway for companies
Kilo Code is an MIT-licensed coding agent for VS Code, JetBrains and the terminal. Its pricing page lists a free plan for individuals with the open-source extensions and any AI model, local models through Ollama or LM Studio at $0, Teams at $15 per user a month with data privacy controls and shared keys, and Enterprise with SSO, OIDC and SCIM, audit logs, limits on which models and providers can be used, and a shared private gateway for your own keys. It moves fast: version 7.8.27 came out on 5 November 2026.
7. OpenHands: autonomous coding agents on your own servers
OpenHands (MIT) is for teams that want agents doing whole tasks, such as pull-request reviews, dependency updates or turning GitHub issues into work, rather than autocomplete. According to its repository, the Agent Canvas is a self-hosted control centre that runs on your machine by default and can run agents in Docker containers, on VMs or inside your company's infrastructure, with any LLM. OpenHands Cloud and Enterprise are optional paid ways to run it. Version 1.40.0 came out on 12 November 2026.
8. OpenCode: a provider-agnostic agent for the terminal
OpenCode is an MIT-licensed coding agent for the terminal, with a desktop app. Its provider docs cover many cloud providers and local models through Ollama and LM Studio, so you can point it only at a model server inside your network. Version 1.19.5 came out in October 2026.
9. Aider: git-first pair programming in the terminal
Aider (Apache-2.0) maps your whole repository, edits files across it and commits every change to git with a clear message, so each AI edit is easy to review or undo. It can connect to almost any LLM, including local models. The caution is maintenance: the last tagged release on Aider's GitHub is v0.86.0 from August 2025 and the last code push dates from May 2026.
Tools From Older CodeComplete Lists That Are Discontinued or Not Open Source
The 2025 version of this article mixed open-source tools with paid products and AI models. Here is what changed:
- Continue: its repository says it is no longer actively maintained and is read-only, after a final 2.0.0 release of the VS Code extension, CLI and JetBrains plugin.
- Roo Code: shut down on 15 May 2026; the repository is archived and points users to Cline and to Zoo Code, a community fork.
- Void: the open-source AI editor is deprecated and its repository is archived.
- FauxPilot: an early self-hosted Copilot server built on Salesforce CodeGen models; its last commit dates from May 2023.
- CodeT5 and Polycoder: research models, not assistants you install. Salesforce's CodeT5 repository is archived, and the old link for Polycoder pointed to an unrelated project.
- Hugging Face: a hub for models and datasets, not a coding assistant. It is where you download open-weight coding models for the tools above.
- Tabnine: not open source; tabnine.com now redirects to Tricentis, which bought it. See our free Tabnine alternatives.
- Codeium and Qodo: two different companies, both proprietary. Codeium became Windsurf and now Devin Desktop; Qodo was formerly called Codium.
- Cursor and Replit Ghostwriter: proprietary products; the GitHub links in older lists did not lead to their source code. See our GitHub Copilot alternatives for paid options.
Which Open-Source CodeComplete Alternative Should You Choose?
- You want CodeComplete's model: one private server for the team: Tabby, or a Twinny gateway if your team uses VS Code.
- You want fine-tuning on your own code: Refact, knowing that it is now community-maintained.
- You are one developer and want private autocomplete: llama.vscode or Twinny with a local model.
- You want agents with company controls (SSO, audit logs): Cline Enterprise or Kilo Code Enterprise; both keep the open-source core.
- You want agents running on your own infrastructure: OpenHands.
- You live in the terminal: OpenCode, or Aider if you accept its slower pace.
Comparing more options? Our open-source GitHub Copilot alternatives guide covers local models versus your own API key and hardware needs in detail. Older lists on the same topic: CodeComplete AI alternatives, free CodeComplete AI alternatives, more CodeComplete alternatives, free alternatives to CodeComplete AI and open-source Tabnine alternatives.
How Founders Use Self-Hosted Coding Assistants
For a startup, privacy is often a customer question before it is a technical one. If you build software for banks, health companies or public bodies, their security questionnaires may ask where your code and their data go; a self-hosted assistant gives a simple answer. For speed to a first version, our guides on building an AI MVP on a budget, no-code MVP development and prototyping a SaaS with AI coding show where coding help fits, and the rise of vibe coding explains how non-developers now build with AI. For paid tools by use case, see the best AI coding tools for entrepreneurs.
The same self-hosting logic works for the rest of your stack: open-source ChatGPT alternatives for a private chat assistant, open-source Notion AI alternatives for documents, open-source Replit alternatives for cloud development environments, open-source Retool alternatives, open-source OutSystems alternatives and open-source Mendix alternatives for internal apps, open-source Zapier alternatives for automation, and open-source PlantUML alternatives and open-source draw.io alternatives for architecture diagrams.
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FAQ About Open-Source CodeComplete Alternatives
Is CodeComplete AI still available?
No product is available. Lynx, the Y Combinator company that built CodeComplete, is listed as inactive on Y Combinator's site, and on 13 November 2026 codecomplete.ai showed only a "Launching Soon" template page.
What is the best open-source alternative to CodeComplete?
Tabby, because it does the same job: a self-hosted server that gives a whole team code completion and chat without sending code outside. Refact is the closest if you want fine-tuning on your own codebase.
Can I fine-tune an open-source coding assistant on my own code?
Refact's homepage offers fine-tuning on your codebase and on-premise deployment. Most other tools use retrieval instead: they index your repositories and give the model the relevant code with each request.
Which open-source coding assistants run fully offline?
Tabby, Twinny and llama.vscode are built for models on your own hardware. Cline, Kilo Code, Refact, OpenCode and Aider can also run fully local if you connect them only to Ollama, LM Studio, llama.cpp or a similar local server.
What hardware do I need for a self-hosted coding assistant?
For autocomplete, llama.vscode's README suggests a 1.5B model under 8 GB of video memory, 3B under 16 GB and 7B above 16 GB. Agents need larger models, so a shared GPU server is often cheaper than upgrading every laptop.
Is Tabby free for companies?
Tabby's Community plan is free and open source for up to 5 users. Team costs $19 per seat a month for up to 50 users, and Enterprise is priced on request.
Are Cline and Kilo Code open source?
Yes. Cline is Apache-2.0 and Kilo Code is MIT. Both sell enterprise plans with SSO and audit logs on top; Cline's JetBrains extension is part of its Enterprise plan.
Is Continue still a good choice?
No. Its repository says it is no longer actively maintained and is read-only, after a final 2.0.0 release.
What happened to Refact.ai?
Refact retired its hosted Refact Cloud in 2026. The software stays open source (BSD-3-Clause) and community-maintained, with development moved to a fork on GitHub.
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About the Author
Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. Throughout her startup experience she has applied for multiple startup grants at the EU level, in the Netherlands and Malta, and her startups received quite a few of those. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
