Diffblue
diffblue.com
Reinforcement Learning
Code Intelligence
Software Testing & QA
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Overview
News
Salaries
Products
People
Growth
Offices
Financials
Funding and backers
Total raised
$22M
14 rounds on record
Latest round
Venture round
Aug 2026 · 2 mo ago
Team
51-200
employees, estimated range
Backers
3
Albion, Oxford Science Enterprises
The money's age
Fresh money
2 months since the last round · not hiring
Momentum
20/100
fresh money
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Aug 6
Raised a round Venture round
Nov 11, 2025
Raised a round Venture round
May 23, 2025
Raised a round Venture round
Nov 18, 2024
Launched Diffblue Launches New Developer Edition for Individuals and Small Teams · FinanzNachrichten.de
Oct 25, 2024
Raised a round Venture round
Nov 22, 2023
Raised a round Venture round
Mar 27, 2023
Raised a round Venture round
May 17, 2022
Raised a round Venture round
Jan 24, 2022
Raised a round Venture round
Jul 27, 2020
Raised a round Venture round
Mar 16, 2020
Raised a round Venture round
Nov 8, 2019
Raised a round Venture round
Dec 12, 2018
Raised a round Venture round
Jun 27, 2017
Raised a round Series A $22M · TechCrunch
Jun 22, 2017
Raised a round Venture round
2016
Founded
Tractionpublic signals, read monthly
Web presence
top 0.31%
of 133.2M domains by links, Common Crawl
Hacker News stories
8
best: 5 points
Funding rounds
Registers and programsofficial lists and records that name the company
| Legal entity | Diffblue Limited | its site |
| Registered | 19 Jan 2016 |
Backed byfrom the funds' portfolios and accelerator catalogs
Albion 
Oxford Science Enterprises Investors in similar startupsfunds that back the companies most like this one
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Overview
Diffblue automatically writes unit tests for Java code using reinforcement learning rather than generative language models. Founded in 2016 as a University of Oxford spin-out, its Cover product generates tests that compile and pass on the first run. Large banks and enterprises use it to raise coverage on legacy codebases.
News
New Diffblue Testing Agent Automatically Generates Comprehensive Regression Test Suites To Derisk Application Modernization
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New Diffblue Testing Agent Automatically Generates Comprehensive Regression Test Suites To Derisk Application Modernization
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Diffblue's Latest Innovations in Unit Test Generation Deliver 20x Productivity Advantage Versus AI Coding Assistants
New benchmark study confirms Diffblue's advantages over LLM coding assistants realized through its reinforcement learning-powered agentic capabilities Diffblue today announced the release of the next
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Diffblue's Latest Innovations in Unit Test Generation Deliver 20x Productivity Advantage Versus AI Coding Assistants
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Report
Diffblue Launches New Developer Edition for Individuals and Small Teams
Newest release of Diffblue Cover for Java professionals empowers individual developers and small teams to level-up their code with AI-powered unit testing Diffblue, creators of the world's first
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Report
Diffblue raises $6.3M for autonomous AI-powered test generation platform
Diffblue raises $6.3M for autonomous AI-powered test generation platform - SiliconANGLE
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Report
Diffblue Secures $6.3 Million in New Funding Amidst 3x Growth Period
New capital, customers and CEO to fuel explosive momentum for generative AI-for-code market innovator Diffblue, creators of the world's first fully autonomous generative AI-for-code software, today
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Announcing Diffblue Cover Support for GitHub Actions - Diffblue
Announcement - Diffblue Cover now integrates directly into your GitHub Actions workflow to autonomously write and update Java unit tests for your projects.
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Community Edition (Download) - Diffblue
Download Diffblue Cover Community Edition's free IntelliJ plugin here.
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Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
Oxford
United Kingdom
HQ
50-200 est. staff
Financials
Total raised
$22M
Latest round
Venture - Series Unknown
Funding rounds
14
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Venture - Series Unknown | 2026 | — | Details |
| Venture - Series Unknown | 2025 | — | Details |
| Venture - Series Unknown | 2025 | — | Details |
| Venture - Series Unknown | 2024 | — | Details |
| Venture - Series Unknown | 2023 | — | Details |
| Venture - Series Unknown | 2023 | — | Details |
| Venture - Series Unknown | 2022 | — | Details |
| Venture - Series Unknown | 2022 | — | Details |
| Venture - Series Unknown | 2020 | — | Details |
| Venture - Series Unknown | 2020 | — | Details |
| Venture - Series Unknown | 2019 | — | Details |
| Venture - Series Unknown | 2018 | — | Details |
| Series A | 2017 | $22M | Details |
| Venture - Series Unknown | 2017 | — | Details |