Best Self-Hosted AI Coding Assistants in 2026

1. Tabby — best for fully self-hosted teams

Tabby is the best self-hosted coding assistant in 2026 because privacy is its default, not an enterprise upsell. It is open-source under Apache-2.0, free to run entirely on your own GPU, and provides plugins for VS Code, JetBrains, Neovim, Vim, and Eclipse — source code never leaves your infrastructure, which is exactly what regulated industries need. A managed team tier is available at $19 per user per month. It suits teams that cannot send code to the cloud and want a Copilot-style completion experience they fully control. The honest caveat is operational: you supply and maintain the GPU, and the open models Tabby runs still trail frontier cloud models on complex multi-file reasoning — you trade some raw capability for complete data control.

2. Pieces — best for on-device privacy

Pieces is an on-device AI coding companion built around a Long-Term Memory Engine that captures context from your workflow and keeps it local, with offline-capable local models so your code and context stay on your machine. The core product is free at $0, with extensions for VS Code, JetBrains, and browsers plus a CLI. It fits individual developers who want a private, memory-rich assistant without a cloud dependency. The honest caveat is that Pieces is a context-and-memory companion rather than a full agentic editor — it augments your workflow rather than autonomously writing large changes — and its premium models run in the cloud, so the fully-private experience is the local-model path on the free tier, not the paid cloud upgrade.

3. JetBrains AI — best for local models in JetBrains

JetBrains AI brings its AI Assistant and Junie agent into IntelliJ, PyCharm, WebStorm, and the rest of the JetBrains family — and crucially it can run local models via Ollama or LM Studio with no credits consumed, keeping inference on your own machine. Pricing starts at $10/month, and a free tier is available. It is the natural pick for teams already standardized on JetBrains IDEs who want a private local-model option. The honest caveat is ecosystem lock-in: the experience is best (and the local-model integration only relevant) inside JetBrains IDEs, and wiring up Ollama or LM Studio for the private path is your own setup work rather than a turnkey deployment.

4. Factory AI — best for air-gapped enterprises

Factory AI runs autonomous coding agents — its “Droids” — that plan and execute multi-step engineering work, and it supports on-premises, air-gapped, and VPC deployment for organizations with strict data-control requirements. Pricing starts at $20/month. It fits enterprises that want agentic autonomy on a real codebase without their source ever touching a public cloud. The honest caveat is that there is no free tier, and agentic autonomy on complex changes still needs human oversight — a Droid can move fast in the wrong direction on an ambiguous task — so budget for review time and treat the air-gapped deployment as the reason to choose it rather than expecting hands-off delivery.

5. Tabnine — best for model choice with zero retention

Tabnine offers code completion across VS Code, JetBrains, Visual Studio, and Eclipse with a choice of underlying LLM, and deployment options spanning VPC, on-premises, and fully air-gapped, backed by a zero-data-retention policy. Pricing starts at $39 per user per month. It suits regulated teams that want frontier-model quality with a private deployment and the flexibility to pick which model handles their code. The honest caveat is cost and audience: Tabnine has moved fully upmarket, so there is no cheap individual tier, the $39 entry is annual-billed and team-oriented, and the air-gapped deployment that justifies it is an enterprise commitment — solo developers wanting private completion are better served by Tabby or Pieces.

How we picked

We ranked these five on the axis that matters for teams that can’t send code to the cloud — genuine self-hosted, on-device, or air-gapped deployment — weighing how private the default path is, editor coverage, verified price, and capability. Tabby leads because it is self-hosted by default and free, rather than private only as an enterprise add-on. This list is distinct from our open-source coding-agents and general self-hosted guides; here the specific question is keeping your code off the cloud while still getting AI assistance. Prices were verified in July 2026 against each product’s official pricing; no tool paid or was paid to appear.