The API for
Company Formation

Incorporate UK companies inside your product. Compliance, filings, and status webhooks handled by Letsy.

Explore Letsy API
server.js
nodejs

Faster onboarding,
happier customers

Transform your user experience with embedded company formation. Reduce drop-off, increase conversions, and eliminate compliance headaches.

Seamless User Experience

Keep users in your app throughout the entire formation process. No redirects, no friction.

Zero Compliance Risk

We handle ECCTA verification, AML checks, and all regulatory filings.

Developer-First API

Modern REST API with comprehensive docs, SDKs, and webhook support. Built for developers, by developers.

API Integration Flow

See how simple it is

Your App
Collect company information
Letsy
Handle compliance & filing
Processing...
Companies House
Official incorporation
Company Incorporated!

Turn onboarding into
incorporation

Our API provides a complete suite of services that your users need to incorporate and operate their companies seamlessly.

Company Incorporation

Complete UK company formation with Companies House filing, including all required documentation and compliance checks.

  • Companies House registration
  • Certificate of incorporation
  • Memorandum & Articles of Association
  • Share certificates
  • ECCTA-compliant ID verification

Registered Address Service

Professional UK business address for company registration and official correspondence handling.

  • Central London business address
  • Companies House compliance
  • HMRC correspondence handling
  • Legal document acceptance
  • Professional business presence

Mail Forwarding Service

Professional mail forwarding service ensuring all official correspondence reaches your customers promptly.

  • Official mail forwarding
  • HMRC correspondence handling
  • Companies House notifications
  • Secure delivery tracking
  • Real-time notifications

Embed incorporations across
your product suite

From neobanks to legal platforms, keep users in-flow while Letsy handles ID checks and filings.

Neobanks

Letsy supports businesses across the fintech ecosystem — from instant business account opening with embedded company formation to premium banking services for established enterprises.

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Accounting

Quickly launch and grow client relationships with a unified platform for company formation, bookkeeping, tax filing, payroll, and more.

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Legal & SaaS

Get everything you need to onboard clients, manage multi-party formations, handle compliance requirements, all in one place.

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Proptech

Enable property investors and real estate platforms to quickly establish SPVs and holding companies for property investments, development projects, and portfolio management.

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Freelance Platforms

Help freelancers and contractors transition to limited companies for tax efficiency, with seamless onboarding and automated compliance management.

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E-commerce

Support marketplace sellers and dropshippers in establishing legitimate business entities for professional operations, VAT registration, and business banking.

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Formation Agents

Empower formation agents and business service providers to offer streamlined company incorporation services with automated compliance and professional documentation.

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Incorporation built into
your product

Create UK companies with a single API. Compliance, registered address, and webhooks included.