How does the engagement model work?

It's a four-stage, fixed-price model: Assessment, Specification, Modernization, and Enablement. You commit and pay per stage, with validation evidence at each step.

Is it a SaaS tool or a consulting service?

It's primarily a service delivered through a platform and a live customer workspace. The platform provides the analysis; Swimm's experts and AI agents perform the work.

What technologies and languages do you support?

We support a wide range, with deep coverage for legacy systems like COBOL, JCL, and PL/I, as well as modern stacks including .NET and Java for large-scale migrations.

How does the 'deterministic analysis' differ from standard AST parsing?

Our proprietary engine goes deeper, mapping cross-repo relationships, data flows, and entry points to create a verifiable system graph before AI or humans intervene.

Can we deploy on-premise or in an air-gapped environment?

Yes, we offer on-premise deployment options, including for air-gapped environments, and support customer-managed LLMs to keep your data in your control.

Directory/Coding/Code Modernization/Swimm

Swimm

Swimm is a modernization platform designed to de-risk and execute complex software transformations, from API-first architecture to mainframe modernization. Its core is a proprietary deterministic analysis engine that maps code dependencies, data flows, and system context with high accuracy. This structured understanding is then used by AI agents and senior engineers to perform large-scale migrations, refactor monoliths into microservices, or build an AI-ready knowledge base for tools like Copilot and Cursor. The platform operates through a fixed-price, stage-gated engagement model (Assessment, Specification, Modernization, Enablement) with validation at each step. It delivers changes via a live customer workspace, providing traceability and verifiable artifacts. Swimm is SOC 2 and ISO 27001 compliant, supports on-premise and air-gapped deployments, and can use customer-managed LLMs. It claims to have analyzed over 100 million lines of code, including legacy systems in COBOL, JCL, and

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Added on

Sep 22, 2026

Codebase AnalysisLegacy MigrationAI Context LayerSOC 2 CompliantOn-PremiseMainframe Support

Product information

Everything worth knowing about Swimm

The complete picture — from everyday features to the technical detail builders and IT folks dig for.

Core features

What it actually does

API-First Architecture Service

Turns embedded business logic into reusable services that support healthy product evolution around one source of truth.

Agentic Development Context Layer

Builds a validated knowledge base for AI tools (Copilot, Cursor, Claude Code, internal agents, MCP servers) to understand your codebase.

Large-Scale Migrations

Directly executes complex migrations (like .NET, Java, mainframe) with clear scope, validation, and staged delivery.

Four-Stage Engagement Model

Fixed-price, step-by-step process (Assessment, Specification, Modernization, Enablement) with validation evidence at each stage.

Technical capabilities

Proprietary Deterministic Analysis Engine

Maps dependencies, entry points, data flows, dead code, and cross-repo relationships for trustworthy output.

AI-Agent Orchestration

Anchored in static analysis, AI agents apply verified patterns across the codebase, coordinating workflows around trusted system context.

On-Premise & Air-Gapped Deployment

Includes deployment in restricted environments with customer-managed LLMs for data control.

Must watch videos

Swimm 2.0: The understanding platform for your AI modernization

42:42

Tutorial42:42

Swimm 2.0: The understanding platform for your AI modernization

How Swimm Helps Enterprises Understand Legacy Applications

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Tutorial0:51

How Swimm Helps Enterprises Understand Legacy Applications

Modernizing legacy applications is nearly impossible without first understanding them. That’s where Swimm’s Application Understanding Platform comes in. Swimm combines deterministic static analysis with generative AI to give enterprises a clear, reliable, and cost-effective way to understand their most complex codebases. Key capabilities: 🔑 Business rule extraction – Identify and explain business logic hidden in legacy code. 🔑 Architectural overviews – Map and break down programs, jobs, flows, and dependencies. - Natural language clarity – Turn cryptic file and variable names into meaningful terms. Customizable support – Handle COBOL, CICS, PL/I, and proprietary implementations. Trustworthy results – Eliminate LLM hallucinations with deterministic analysis at scale. Whether you’re tackling COBOL modernization, financial systems, or enterprise-critical code, Swimm helps teams gain the clarity they need to move forward with confidence. 👉 Learn more at Swimm.io

(AI COVER) Swim by LNGSHOT (Original song by CHASE ATLANTIC)

3:47

Tutorial3:47

(AI COVER) Swim by LNGSHOT (Original song by CHASE ATLANTIC)

Model Voice by ‪@Yeppiyeppi & ‪@ChaeryLeon Artist: LNGSHOT Original Song: Swim by Chase Atlantic Original Artist: Chase Atlantic DISCLAIMER!!! This video features an AI-generated voice cover created for entertainment and experimental purposes. The voice used in this video is generated by artificial intelligence and is not the real voice of any artist.This content is not intended to impersonate, mislead, or represent the original artist. It is a fan-made AI cover created using voice synthesis technology. All rights to the original song, music, and lyrics belong to their respective copyright owners and the original artist. No copyright infringement intended. This video is created for entertainment and non-commercial purposes only. If you are the copyright owner and would like the video removed or credited differently, please contact me and I will respond promptly. Please mention this channel if you share or upload this AI cover anywhere. Thank you.

Who uses it

Real use cases, no hype

Legacy Mainframe Migration

Modernize COBOL/JCL systems to cloud-native architectures with validated mappings and staged execution.

AI-Ready Codebase Preparation

Build a verified knowledge base for AI tools like Copilot or Cursor to understand complex, undocumented code.

Monolith to Microservices

Decompose monolithic applications into services with deterministic dependency analysis and API extraction.

Compliance & Audit Readiness

Generate audit-ready artifacts and system documentation from code analysis for regulatory requirements.

M&A Tech Due Diligence

Accurately map acquired codebases, dependencies, and risks before integration.

API-First Architecture

Extract embedded business logic into reusable, well-documented APIs.

Large-Scale Code Analysis

Analyze 100M+ lines of code to map dependencies, dead code, and critical flows.

What's great

End-to-end modernization with senior engineer validation
Proprietary deterministic analysis engine for accurate mapping
Live customer workspace for transparent progress tracking
SOC 2 and ISO 27001 certified, air-gapped deployment option

Technical strengths

Supports complex legacy systems (COBOL, JCL, PL/I)
Hybrid AI model: static analysis + GenAI + human SMEs
Generates AI-ready knowledge base for codebase context

Where it falls short

Service-based, not a self-serve SaaS product
Requires engagement and booking a demo/call
Pricing likely high due to consulting & scale
Staged, fixed-price model may not suit agile, iterative work

Technical limitations

Proprietary engine limits third-party integration transparency
Focus is on large-scale modernization, not quick fixes

For technical folks

The deep-dive specs

FAQ

Includes technical Q&A

Swimm provides modernization services combining static analysis, generative AI, and senior engineers to deliver accurate, large-scale code migrations and API extractions.