# Signal Sciences funding: rounds and investors > Signal Sciences has raised $52M across 3 rounds since 2014. Investors include Index Ventures, Harrison Metal and O'Reilly AlphaTech Ventures. Source: https://millionrounds.com/company/signal-sciences (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # Who invested in *Signal Sciences* 3 rounds we have observed, with the 10 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Cybersecurity Funding summary Updated 26 Oct 2026 **$52M** raised across 3 rounds since 2014, from 3 sources **$2.0M** Seed **$15M** Series B **$35M** Series C - **Latest round:** Series C, $35M Feb 2019 - **Step-up i:** 2.3× - **Investors:** 10 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2015 2016 2017 2018 2019 **$2.0M** Seed **$15M** Series B **$35M** Series C - **First round:** Seed, $2.0M - **Biggest round:** $35M - **Usual gap between rounds:** 3 years ## The rounds - **Feb 2019** Series C **$35M** *3 new* *2 returning* [Index Ventures](https://millionrounds.com/fund/index-ventures) [CRV](https://millionrounds.com/fund/crv) [Harrison Metal](https://millionrounds.com/fund/harrison-metal) [OATV](https://millionrounds.com/fund/oatv) Lead Edge Capital/ CRV Reported by FinSMEs - **May 2017** Series B **$15M** *2 new* *1 returning* [Index Ventures](https://millionrounds.com/fund/index-ventures) [O'Reilly AlphaTech Ventures](https://millionrounds.com/fund/o-reilly-alphatech-ventures) CRV/ Harrison Metal Reported by FinSMEs - **May 2014** Seed **$2.0M** *5 new* [Harrison Metal](https://millionrounds.com/fund/harrison-metal) [O'Reilly AlphaTech Ventures](https://millionrounds.com/fund/o-reilly-alphatech-ventures) [Bob Pasker](https://millionrounds.com/fund/bob-pasker) Alex Stamos Chad Dickerson From a historical funding record ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Seed** 2014 **Series B** 2017 **Series C** 2019 [Index Ventures](https://millionrounds.com/fund/index-ventures) [Harrison Metal](https://millionrounds.com/fund/harrison-metal) [O'Reilly AlphaTech Ventures](https://millionrounds.com/fund/o-reilly-alphatech-ventures) [CRV](https://millionrounds.com/fund/crv) [Bob Pasker](https://millionrounds.com/fund/bob-pasker) [OATV](https://millionrounds.com/fund/oatv) Alex Stamos Chad Dickerson CRV/ Harrison Metal Lead Edge Capital/ CRV ## Everyone who backed them [Index Ventures](https://millionrounds.com/fund/index-ventures) VC firm **2** rounds [Harrison Metal](https://millionrounds.com/fund/harrison-metal) VC firm **2** rounds [O'Reilly AlphaTech Ventures](https://millionrounds.com/fund/o-reilly-alphatech-ventures) VC firm **2** rounds [CRV](https://millionrounds.com/fund/crv) VC firm **1** round [Bob Pasker](https://millionrounds.com/fund/bob-pasker) Angel **1** round [OATV](https://millionrounds.com/fund/oatv) VC firm **1** round Alex Stamos no record of our own yet **1** round Chad Dickerson no record of our own yet **1** round CRV/ Harrison Metal no record of our own yet **1** round Lead Edge Capital/ CRV no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=signal-sciences). ## Also claim to have backed them This firm lists Signal Sciences as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Across Capital](https://millionrounds.com/fund/across-capital) Growth equity Per its own site ## Quick answers about Signal Sciences ### Who invested in Signal Sciences? Signal Sciences's investors include Index Ventures, Harrison Metal, O'Reilly AlphaTech Ventures, CRV and Bob Pasker, and 5 more on record. ### How much has Signal Sciences raised? Signal Sciences has raised $52M across 3 rounds since 2014. ### When did Signal Sciences last raise? Signal Sciences's most recent round was a Series C of $35M in Feb 2019. ### What was Signal Sciences's biggest round? Its most recent round, $35M in Feb 2019, is also its largest on record. ### Who backed Signal Sciences first? Signal Sciences's first round on record, in May 2014, was backed by Harrison Metal, O'Reilly AlphaTech Ventures and Bob Pasker and 2 others. ### What stage is Signal Sciences at? Signal Sciences's latest named round is a Series C, in Feb 2019. ### Where is Signal Sciences based? Signal Sciences is based in the United States. ## Companies like Signal Sciences In the same sector, and raised in the last eighteen months. 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