How much does Swimm cost in 2026?
Swimm does not publish a price list anymore. Its pricing page says pricing "is based on the number of lines of code you want to understand," and the only way to get a number is to book a demo. Trials are run as a proof of concept through their sales team. If you are a 5 to 20 person engineering team hoping to sign up with a card this afternoon, that is the first thing to know.
Older listings on review and comparison sites still show per-seat tiers, such as a free plan for small teams, a Teams plan around $16 per seat per month and an Enterprise Starter plan around $28 per seat. Those numbers describe how Swimm used to sell. The current Swimm pricing page, checked in September 2026, lists no tiers at all.
What changed at Swimm
Swimm started as a code documentation tool: engineers wrote docs coupled to the code, and the docs flagged themselves when the code drifted. It was sold per seat to regular product teams, often for onboarding.
Today Swimm positions itself as a code modernization platform. The homepage talks about mainframe and legacy coverage, COBOL, JCL and PL/I support, extracting business logic, and fixed-price stages from assessment to modernization. It supports on-prem and air-gapped deployments, can run on your company's own LLM instance such as Azure OpenAI Service, and is SOC 2 and ISO 27001 compliant. Pricing follows that audience: it scales with the size of the codebase you need analyzed, and Swimm says it can handle millions of lines of code.
That is a strong fit for a bank modernizing a mainframe. It is a harder fit for a SaaS team that wants new hires to find their way around three GitHub repos.
Swimm pricing at a glance
| Item | What Swimm says (September 2026) |
|---|---|
| Public price list | None. "Get a demo" is the only call to action |
| Pricing basis | Number of lines of code you want to understand |
| Trial | Proof of concept, arranged through sales |
| Codebase size limits | None stated; built for millions of lines |
| Deployment | Cloud, on-prem and air-gapped |
| Own LLM | Supported, for example Azure OpenAI Service or OpenAI Enterprise |
| Compliance | SOC 2 and ISO 27001, reports on request |
| System integrators | Project-based pricing available |
Is Swimm worth it for a small engineering team?
For most small teams, no. Swimm is worth it when you have a large legacy estate, need air-gapped or on-prem deployment, or are planning a modernization project where knowledge extraction is the deliverable. A 5 to 20 person team on GitHub that mainly needs to find code and onboard new hires will usually pay less and start faster with a self-serve codebase Q&A tool.
The way to decide is to write down the questions your engineers ask in a normal week. If they are "where is the refund logic?", "what calls this function?" and "how does a webhook get processed?", you need search and answers over the current code. If they are "what business rules are buried in this 40-year-old COBOL batch job, and how do we rewrite it?", you need what Swimm sells.
Cheaper Swimm alternatives for teams on GitHub
These are the options a small team usually weighs instead. Prices were checked on each vendor's own pricing or billing page in September 2026.
| Tool | Price | What it does | Self-serve signup | Best for |
|---|---|---|---|---|
| CodeIndex | $99/month for 5 users, $299/month for 20 | Semantic code search and AI answers with file citations | Yes, 14-day trial on any plan, card at checkout | GitHub teams onboarding engineers and answering code questions |
| Devin with DeepWiki | Teams: $40 per dev seat, $80/month minimum | Generated repo wikis, Ask Devin, plus an autonomous coding agent | Yes | Teams that also want an AI agent writing code |
| Sourcebot | Pro: $20 per user/month | Self-hosted code search with an Ask feature | Yes, you host it | Teams that must keep code on their own servers |
| Unblocked | $29 per user/month annual, $35 monthly | Answers from code plus Slack, Jira and Confluence, AI code review | Yes, 21-day trial | Teams whose context lives outside the code |
| Sourcegraph | Enterprise from $16,000/year | Code search across many hosts, Deep Search | No, sales-led | Large organizations with many code hosts |
| Swimm | Custom, based on lines of code | Code understanding and legacy modernization | No, demo and proof of concept | Enterprises with mainframe and legacy code |
For a head-to-head on the wiki approach, see our DeepWiki alternative comparison. For enterprise code search pricing, see what Sourcegraph costs, and for per-user pricing on a Slack and Jira aware tool, see Unblocked pricing.
What does CodeIndex cost compared with Swimm?
CodeIndex has published, flat team prices. Starter is $99 a month for 5 users, 10 repositories and 1,000 queries. Pro is $299 a month for 20 users, 50 repositories, 10,000 queries and API access. Enterprise is $999 a month for unlimited users and repositories, 30,000 queries, SSO/SAML and a one-year audit log. Every plan covers private GitHub repos, and every plan starts with a 14-day trial of the plan you choose, with the card charged only when it ends.
Because the price is per team rather than per seat or per line of code, adding the product manager or a QA engineer costs nothing extra until you pass the plan's user limit. You also know the number before you talk to anyone.
Where Swimm is the better choice
Being straight about this saves everyone time. Pick Swimm over CodeIndex if any of these are true:
- Your critical code is COBOL, JCL or PL/I on a mainframe. CodeIndex indexes 40 common file types for modern application code, not mainframe languages.
- Your code cannot leave your network. Swimm offers on-prem and air-gapped deployment. CodeIndex is hosted only.
- You are not on GitHub. CodeIndex connects to GitHub repositories only.
- You are running a formal modernization program and want a vendor involved in assessment, specification and rewrite stages.
If none of those apply, you are probably paying for capability you will not use.
How to move from Swimm docs to codebase Q&A
Teams that used Swimm's per-seat docs product mostly want two things back: a way for new engineers to learn the codebase, and docs that do not go stale. Here is a practical switch:
- Keep the docs that explain decisions. Architecture decisions, runbooks and conventions still belong in Markdown in the repo. They are the "why" that code cannot show.
- Drop the docs that only describe where code lives. Those are the ones that rot. Let new hires ask the codebase instead.
- Index the repos new engineers touch first. Paste the GitHub URLs into CodeIndex and let it index; most repos are ready in minutes.
- Turn your old walkthroughs into starter questions. "How does checkout work?" and "Where are permissions enforced?" become the first things a new hire asks, with answers that cite current code.
Onboarding also has a side that is not about code at all: security training, policy sign-offs and role certifications. Teams usually run that through a corporate LMS for training and certifying new hires, and keep the codebase learning in engineering tools. Our developer onboarding tool page covers the engineering half in detail.
Frequently asked questions
How much does Swimm cost?
Swimm does not list prices. Its pricing page says pricing is based on the number of lines of code you want to understand, and you get a quote through a demo. Older third-party listings show per-seat plans around $16 to $28 per seat per month, but those tiers no longer appear on swimm.io.
Does Swimm have a free plan?
Not on its current pricing page. Swimm offers a proof of concept arranged with its sales team instead of a self-serve free tier. Some review sites still show an older free plan for small teams, which reflects how Swimm used to sell.
Does Swimm offer a free trial?
Swimm offers proof of concept engagements rather than a self-serve trial. You contact the team to start one. CodeIndex, by comparison, has a 14-day self-serve trial on every plan, with the card charged only when it ends.
What is a good Swimm alternative for small teams?
For small teams on GitHub, CodeIndex is a close fit for onboarding and code questions at $99 a month for 5 users. Devin with DeepWiki suits teams that also want a coding agent, and Sourcebot suits teams that must self-host.