Gradient Ventures, the Google unit that led coding review service PullRequest's December seed round, returned to do the same for its series A.

Gradient Ventures, internet technology provider Google’s artificial intelligence fund, has led an $8m series A round for US-based coding review service PullRequest, TechVibes has reported.

Accelerator operator Y Combinator, boutique seed fund Fika Ventures, investment firm Lynett Capital and venture capital fund Defy Partners also contributed to the round.

PullRequest uses a combination of artificial intelligence technology, professional reviewers and tooling to review code for software developers, providing suggestions and fixes for errors or problems.

Gradient Ventures had previously led the startup’s $2.3m seed round in December 2017, investing alongside the rest of the series A investors as well as communication software provider Slack’s corporate venturing vehicle, Slack Fund, FundersClub and Liquid2 Ventures.