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Portia AI
London, GB · Founded 2025 · 9 employees on LinkedIn · 2 known investors
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Rezonant provides an AI "product brain" that connects a company's tools (GitHub, Linear, Slack, Notion, customer calls and more) into a self-organizing context layer stored in GitHub, and runs a Slack agent that automates product work like writing PRDs, building prototypes, and opening pull requests. It is built for product teams at tech companies and integrates with coding agents such as Claude and Codex.
Founders & leadership
Portia AI was founded in 2025 by Emma Burrows.
Investors · 2
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Companies House · registry record
View on Companies House ↗- Registered name
- PORTIA AI LTD
- Company number
- 15729214
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 May 2024
- Registered office
- 124 City Road, London, EC1V 2NX
- Nature of business (SIC)
- 62012 — Business and domestic software development
- Accounts
- last made up to 31 May 2025 · next due 28 Feb 2027
- Confirmation statement
- last made up to 18 May 2026 · next due 1 Jun 2027
Current officers · 1
- Emma Louise Burrows — director, appointed 19 May 2024
Source: Companies House public register · retrieved 20 Sept 2026. Contains public sector information licensed under the Open Government Licence v3.0.
In the news
Frequently asked questions
- What does Portia AI do?
- Rezonant provides an AI "product brain" that connects a company's tools (GitHub, Linear, Slack, Notion, customer calls and more) into a self-organizing context layer stored in GitHub, and runs a Slack agent that automates product work like writing PRDs, building prototypes, and opening pull requests. It is built for product teams at tech companies and integrates with coding agents such as Claude and Codex.
- Who founded Portia AI?
- Portia AI was founded by Emma Burrows in 2025.
- Who are Portia AI's investors?
- Portia AI's investors include firstminute capital, General Catalyst.
- Where is Portia AI headquartered?
- Portia AI is headquartered in London, GB.