Buyer's guide
What AI agent frameworks cost to start and scale
Most AI agent frameworks are free to start, and the bill arrives with the hosted layer, priced by plan, seat, credits or usage.
Buyer's guide Coding agents
6 of 8 coding agents let you keep code out of training; goose and OpenCode depend on the model. Ranked by opt-out, then entry price from $10 a month.

Six of the 8 coding agents we compared let you keep your code out of training: Junie, Zed, Kilo Code, Augment Code, Claude Code and Gemini Code Assist [1]. goose and OpenCode answer “partly”: the model you route to sets the terms [2][3].
On 28 October 2026 we listed 197 agents: 90 confirm a training opt-out and 32 sit under Coding agents [1]. We compared 8 of them, reading every fact from vendor pages and our listings between 2 Sep and 24 Oct 2026 [4].
Ranked on the training answer first and entry price second, Zed comes first: Pro is $10 a month, and nothing is retained or trained on unless you rate a response or opt into training collection [5][6]. Augment Code is the pick when you need no-training written into the contract, since every paid plan excludes training on customer data by contract, from $20 a month [7].
Open source and admin controls do not follow the training answer: 4 of 8 are open source, and 3 of 8 answered yes on admin controls [1].
| Agent | Can you opt out of training? | From (entry price) | Free plan | Open source | Admin controls | Best for |
|---|---|---|---|---|---|---|
| 1. Zed | Yes. Off unless you rate or opt in; Business members cannot opt in [6] | $10 a month (Pro) [5] | Yes [5] | Yes [12] | Partly: Business admins lock data sharing [13] | Running other vendors’ agents in an open-source editor [14] |
| 2. JetBrains Junie | Yes. Excluded on every tier, free included, by contract [8] | €10 a seat a month (about $11), in JetBrains AI Credits charged in local currency [9] | Yes [9] | No [15] | Not recorded [1] | Teams standardized on a JetBrains IDE [16] |
| 3. Kilo Code | Yes. States it never trains on your code [10] | $15 a user a month (Teams) [11] | Yes [11] | Yes, extension and CLI under MIT [17] | Not recorded [1] | Switching models freely, local ones included [18] |
| 4. Augment Code | Yes. Every paid plan, by contract [7] | $20 a month [7] | No standing free plan published [7] | Partly: Context Connectors library only [19] | Yes [20] | Leaders running agents across the full SDLC [21] |
| 5. Claude Code | Yes. No-training by default on commercial terms; a toggle on Free, Pro and Max [22] | $20 a month (Pro, billed monthly; training is an account toggle on Pro) [23][22] | No [23] | No [24] | Yes [25] | Terminal-native, scriptable work with CI [26] |
| 6. Gemini Code Assist | Yes. No training on prompts or responses [27] | $22.80 a user a month (Standard, billed monthly) [28] | Individual edition stopped serving on 18 June 2026 [29] | Partly, CLI only [30] | Partly [31] | Teams already on Google Cloud [32] |
| 7. goose | Partly. Your provider decides [2] | Free [33] | Yes [33] | Yes, Apache 2.0 [33] | Partly, per-machine config [34] | Reusing an existing Claude or ChatGPT plan [35] |
| 8. OpenCode | Partly. Paid gateway models don’t train; some free ones may [3] | $10 a month (OpenCode Go) [36] | Yes [36] | Yes, MIT [37] | Yes [38] | Any provider, local Ollama models included [39] |
Facts read 2 Sep to 24 Oct 2026 [1].
Of the 8, 5 have a free plan, 1 has none (Claude Code) and 2 are not recorded (Augment Code and Gemini Code Assist) [1].
We compared 8 of the 197 agents we listed on 28 Oct 2026 [4][1]. The training answer weighs most (yes before partly), then the maker’s own published entry price. Zed, Augment Code, Claude Code and OpenCode publish an entry price in US dollars a month, and those four are compared on it. Junie’s euro seat price and the per-seat prices of Kilo Code and Gemini Code Assist are named as such and left out of that comparison [1].
Best for teams that want a paid plan where training is off unless someone opts in. Pro is $10 a month, and nothing is retained or trained on unless you rate a response or opt into training collection [5][6]. On Business, at $30 a seat a month, both are off by default and members cannot opt in [5][6].
Skip it if your team needs VS Code’s extension ecosystem or a managed cloud development environment [14]. Business admin controls do not reach BYOK, gateways, local models, external agents or extensions [13].
Best for JetBrains IDE teams that want no-training on every tier, including free. Training on your code is off unless you switch it on, the exclusion is ticked on every tier including free, and the commitment is contractually extended to model subcontractors [8]. It starts at €10 a seat a month (about $11), priced in shared JetBrains AI Credits that also cover other AI Assistant features [9].
Skip it if you don’t use a JetBrains IDE day to day: Plan Mode’s UI and Agentic Debugging are built into the JetBrains IDEs [16]. Skip it too if you need the agent’s source; it is not open source [15].
Best for teams that switch models and want an admin filter on training. Kilo states it never trains on your code and does not retain prompts for its own purposes [10]. Its Teams page lists a control to “Filter out models and providers that train on your data or retain prompts, across every surface your developers use.” [10] Teams is $15 a user a month [11].
Skip it if you need one predictable bill [18]. Inference is billed on top through your own key or Kilo Pass credits from $19 a month to $199 a month, with a 5% processing fee on credit purchases [11].
Best for engineering leaders who need the no-training promise as a contract term. Every paid plan excludes training on customer data by contract, and the security page repeats it with an indemnification clause behind the claim [7]. In Augment’s words: “Uncompromising security, backed by SOC 2 Type II, rigorous third-party testing, and ironclad IP protection. We never train on our customer’s proprietary code.” [45]
Skip it if you want a standing free plan or open-source agent code: the pricing page publishes no standing free plan, and the agent, Cosmos platform and CLI are closed [7][19]. Usage meters in dollars with a 40% fee on model spend [7].
Best for teams buying Team, Enterprise or API access who want settings an admin can pin. “Anthropic does not train generative models using code or prompts sent to Claude Code under commercial terms, unless the customer has chosen to provide their data to us for model improvement” [22]. Managed and server-managed settings pin permission rules, model allowlists, telemetry and login method, and local settings cannot override them [25].
Skip the Pro plan if training must be off by contract. “We will train new models using data from Free, Pro, and Max accounts when this setting is on (including when you use Claude Code from these accounts).” [22] The consumer terms describe training as opt-out in account settings [51]. Even then: “Even if you opt out, we will use Materials for model training when: (1) you provide Feedback to us regarding any Materials, or (2) your Materials are flagged for safety review” [51]. Consumer data from users who allow model improvement is kept 5 years, against 30 days for those who don’t [22].
Best for teams already on Google Cloud. “Gemini doesn’t use your prompts or its responses as data to train its models.” [27] Data shared through the Trusted Tester Program “is used for product improvements, not for training Gemini models.” [27] Standard is $22.80 a user a month billed monthly or $19 billed annually [28].
Skip it if you want a free individual tier: it stopped serving requests on 18 June 2026 [29]. Skip it too if you want models other than Gemini [28].
Best for developers who want a free agent on their own machine with a choice of providers. goose is Apache 2.0, governed by the Agentic AI Foundation at the Linux Foundation, and works with 15+ providers including local Ollama [33]. You install it with no account and no vendor payment [33].
It ranks “partly” because goose’s own telemetry is opt-in and excludes your code and conversations, but your LLM provider governs what happens to prompts [2]. The docs say “your conversations, prompts, and information accessed by goose might be sent to the provider” [2].
Skip it if you need a fully managed setup with vendor support; you choose, configure and pay for your own LLM provider [35].
Best for teams that want an MIT-licensed agent with 75+ providers and a central config that can pin one approved gateway [37][55][38]. Paid gateway models carry a zero-retention, no-training commitment [3]. OpenCode Go is $10 a month and Go Plus is $40 a month; OpenCode Zen is pay-as-you-go per token [36].
It ranks “partly” because several free and stealth models may use your data to improve the model [3]. For Big Pickle: “During its free period, collected data may be used to improve the model.” [3] Flint 40B Free adds: “Data is retained for 30 days.” [3] NVIDIA’s free Nemotron endpoints state: “Your use is logged for security purposes and to improve NVIDIA products and services.” [3] Other free models, GLM-5.3-Flash Free and DeepSeek V4.1 Flash Free, are documented as zero-retention with no training [3]. Requests to OpenAI models through Zen are kept 30 days under OpenAI’s data policies [3].
Skip it if your team might pick a free model: several free and stealth models may use your data to improve the model [3].
With your own key, the model provider’s policy governs what you send. In goose, conversations, prompts and information it accesses may go to the LLM provider, whose own policies then apply [2]. OpenAI states: “As of March 1, 2023, data sent to the OpenAI API is not used to train or improve OpenAI models” [59].
The route matters too. In Kilo, a ChatGPT subscription connected in the BYOK section goes through Kilo’s gateway: “Requests and their code context pass through the Kilo Gateway before reaching OpenAI.” [60] Kilo also offers a direct option: “Use this option when you want the local OpenAI provider to use your subscription directly, without the Kilo Gateway.” [60]
| Agent | Own key | Route to note |
|---|---|---|
| Zed | Yes, every plan [5] | Admin locks do not reach BYOK [13] |
| Junie | Yes, six providers; billing bypasses JetBrains [41] | A supplied key wins over the subscription [41] |
| Kilo Code | Yes [44] | ChatGPT via BYOK passes Kilo Gateway; a direct option skips it [60] |
| goose | Your own LLM provider, paid separately [35] | ChatGPT Plus/Pro sign-in for GPT-5 Codex, no separate API key [54] |
| OpenCode | Yes [55] | ChatGPT Plus/Pro login [37] |
Zed Business locks data sharing so members cannot opt in [6][13]. Claude Code managed settings cannot be overridden by local settings [25]. OpenCode’s enterprise config can restrict the agent to one approved gateway [38].
Kilo Code Teams adds a filter on models and providers that train or retain prompts [10]. Augment Code’s admin lever is a repo-committed settings file for cloud agents’ tools, plus enforced budgets on Enterprise [20]. goose’s controls are per-machine config, and Gemini’s tool lists live in each developer’s settings.json [34][31].
Which coding agents never train on my code, on every plan including free?
Junie excludes training on every tier including free, and it has a free plan [8][9]. Zed answers yes and has a free plan [6][5]. Kilo Code states it never trains on your code, and it has a free plan [10][11].
Is training off by default, or do I have to find a toggle?
Off by default on Junie, Zed and Gemini Code Assist’s business editions [8][6][27]. Claude Code is no-training by default on commercial terms, but on Free, Pro and Max training is opt-out in account settings [22][51].
If I bring my own API key, whose training policy applies?
On goose, the provider’s: its docs say prompts and accessed information may be sent to the provider [2].
Can an admin enforce no-training so a developer cannot switch it back on?
Yes, on Zed Business, where members cannot opt in [6]. goose’s controls are per-machine config [34].
Which paid plans put no-training in the contract rather than a setting?
Junie’s paid plans start at €10 a seat a month (about $11), with the exclusion contractually extended to model subcontractors [9][8]. Augment Code’s contract term starts at $20 a month [7]. Claude Code’s commercial terms start with Team, self-serve from 2 seats [22][23].
Does an open-source or self-hosted agent guarantee my code is not used for training?
No. goose and OpenCode are open source and still answer “partly”, because a hosted model’s terms apply [1][2][3]. goose says your prompts may be sent to the provider [2].
This spot is open
All 32 AI coding agents
First paid plans from $5 to $45 a month.
What changed in the index
Agents we’ve just listed and every plan whose price changed.
Buyer's guide
Most AI agent frameworks are free to start, and the bill arrives with the hosted layer, priced by plan, seat, credits or usage.
Buyer's guide
zot, Aider, OpenCode and GitHub Copilot CLI run Claude models from the terminal with a free plan, and add OpenAI models Claude Code lacks.
Buyer's guide
Aissist.io runs AI agents inside your existing helpdesk for small and mid-sized teams, starts free, then meters each interaction so cost tracks volume.
Buyer's guide
Pick by where it runs, how it bills and how you get out: self-host for data control, seat plans for teams, or a firm that builds the agents for you.