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Swimm
What Swimm is
Swimm is a product-enabled service for software modernization that combines deterministic code analysis, AI, and subject-matter experts. Its engine maps dependencies, data flows, and relationships across repositories to build an understanding of a system. That context supports work such as API-first architecture and large-scale migrations, as well as an agentic context layer that creates a validated codebase knowledge base for tools including Copilot, Cursor, Claude Code, internal agents, and MCP servers. Engagements proceed through Assessment, Specification, Modernization, and Enablement, with fixed pricing per stage and validation evidence at each step. Overall pricing depends on the lines of code to understand, and the pricing page directs visitors to request a demo; Proof of Concept options are available by contacting Swimm. It supports web, API, and self-hosted access, including on-premise and air-gapped deployment. Swimm says customers can use an internal LLM such as Azure OpenAI Service or OpenAI Enterprise, and that it can work with codebases of any size, including those with millions of lines.
Who it suits
It is aimed at enterprise teams modernizing complex systems, including mainframe and legacy codebases. Teams needing on-premise or air-gapped deployment, customer-managed LLMs, or support for languages such as COBOL, JCL, and PL/I may find its stated scope relevant.
What it does well
- Maps dependencies and data flows across repositories
- Four staged modernization engagements
- Supports on-premise and air-gapped deployment
- Customers can use an internal LLM
What to know first
- Pricing is available on request
- Price depends on lines of code
- No free plan is listed
Limits
Pricing is based on the number of lines of code Swimm needs to understand, and project-based pricing can be arranged for system integrators. Proof of Concept options require contacting Swimm.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Project-based pricing | Pricing based on lines of code to understand · Project-based pricing can be arranged for system integrators · Proof of Concept options available | On request |
As swimm.io lists them, read 10 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Swimm website
- Contact Swimm to request a demo or discuss pricing
- Ask about a Proof of Concept
- Choose web, API, or self-hosted deployment
- Select the Assessment, Specification, Modernization, and Enablement stages
- Connect supported tools and repositories
- Arrange customer-managed LLM use if required
Verdict
Swimm pairs system analysis with staged modernization work and offers deployment options for restricted environments. Request a demo or Proof of Concept details to assess fit and clarify project pricing.
Questions
How is Swimm priced?
Swimm uses paid, project-based pricing. The amount depends on the number of lines of code to understand, and pricing is provided on request.
Does Swimm offer a free trial?
Yes. Swimm offers a free trial, and it also provides Proof of Concept options through contact with the company.
Which deployment options does Swimm support?
Swimm supports web access, API use, and self-hosted deployment. It also supports on-premise and air-gapped environments.
Can customers use their own language model?
Yes. Swimm says customers can use an internally available LLM, including Azure OpenAI Service or OpenAI Enterprise.
What tools integrate with Swimm?
Listed integrations include VS Code, GitHub, JetBrains IDEs, GitLab, Bitbucket, Azure DevOps Services, Backstage, Slack, Mermaid, Compass, and gitStream.
Which code languages and systems does Swimm support?
Swimm serves complex codebases, including mainframe and legacy systems, and names COBOL, JCL, and PL/I among its supported languages.
Facts from Swimm's own pages
- AI context
- Swimm says it builds a validated knowledge base for AI tools including Copilot, Cursor, Claude Code, internal agents, and MCP servers. · swimm.io, 10 Oct 2026
- Audience
- Swimm describes its work as serving enterprise teams modernizing complex codebases, including mainframe and legacy systems. · swimm.io, 10 Oct 2026
- Codebase size
- Swimm says it can work with codebases of any size, including those with millions of lines of code. · swimm.io, 10 Oct 2026
- Current offering
- Swimm describes itself as a product-enabled service company delivering agentic modernization through deterministic analysis, AI, and subject-matter experts. · swimm.io, 10 Oct 2026
- Customer-managed models
- Swimm says customers can use an internally available LLM, including Azure OpenAI Service or OpenAI Enterprise. · swimm.io, 4 Oct 2026
- Deployment
- Swimm says it supports on-premise and air-gapped deployment, as well as customer-managed LLMs. · swimm.io, 10 Oct 2026
- Headquarters
- New York, New York, United States; Tel Aviv, Israel · swimm.io, 28 Sept 2026
- How delivery works
- Engagements proceed through assessment, specification, modernization, and enablement, with fixed pricing per stage and validation evidence at each step. · swimm.io, 10 Oct 2026
- Integrations
- The integrations page lists VS Code, GitHub, JetBrains IDEs, GitLab, Bitbucket, Azure DevOps, GitHub Copilot, Backstage, Slack, Mermaid, Compass, and gitStream. · swimm.io, 10 Oct 2026
- Language support
- Swimm says it has experience with various COBOL versions and asks customers to contact its team about specific needs. · swimm.io, 10 Oct 2026
- LLM support
- Swimm says it can use a company's internal LLM, including Azure OpenAI Service or OpenAI Enterprise. · swimm.io, 10 Oct 2026
- Modernization work
- Its offerings include API-first architecture, an agentic context layer, and large-scale migrations. · swimm.io, 10 Oct 2026
- Pricing basis
- Pricing is based on the number of lines of code to understand, and the pricing page directs visitors to request a demo rather than listing amounts. · swimm.io, 4 Oct 2026
- Proof of concept
- Swimm says Proof of Concept options are available by contacting the company. · swimm.io, 4 Oct 2026
- Scale
- Swimm says it can work with codebases of any size, including those with millions of lines of code. · swimm.io, 4 Oct 2026
- Security
- Swimm states it is SOC 2 and ISO 27001 compliant and says reports are available upon request. · swimm.io, 10 Oct 2026
- Staged delivery
- Engagements have four stages—Assessment, Specification, Modernization, and Enablement—with fixed pricing per stage. · swimm.io, 4 Oct 2026
- Support
- Swimm lists dedicated enterprise support and implementation teams, and gives customers [email protected] for technical support questions. · swimm.io, 4 Oct 2026
- Support and contact
- The pricing page directs additional questions to [email protected]. · swimm.io, 10 Oct 2026
- System analysis
- Its proprietary engine maps dependencies, data flows, and cross-repository relationships to build system understanding. · swimm.io, 4 Oct 2026
- Trial or evaluation
- Swimm says Proof of Concept options are available and invites prospective customers to contact it. · swimm.io, 10 Oct 2026
- What it does
- Its platform maps dependencies, data flows, and cross-repository relationships to create system understanding for modernization work. · swimm.io, 10 Oct 2026
- Who it serves
- Swimm describes its work as serving complex codebases, including mainframe and legacy systems, and names COBOL, JCL, and PL/I among its supported languages. · swimm.io, 4 Oct 2026
Where Swimm stands on Freedom251
- Developer Documentation Software#26 of 27