# Lightsprint funding: rounds and investors > Lightsprint has raised $6.1M across 2 rounds since 2026. Investors include Rebel Fund, 645 Ventures and Y Combinator. Every round with its source. Source: https://millionrounds.com/company/lightsprint (Millionrounds; every figure on the page links to its filing or article) United States · [Seed startup](https://millionrounds.com/companies) # Who invested in *Lightsprint* 2 rounds we have observed, with the 7 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. AI Developer Tools SaaS Software Raised this month Funding summary Updated 26 Oct 2026 **$6.1M** raised across 2 rounds since 2026, from 2 sources - **Latest round:** Seed, $6.1M Oct 2026 - **Led by:** 645 Ventures - **Investors:** 7 (1 led) 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. 2027 **?** Venture **$6.1M** Seed - **First round:** Venture - **Biggest round:** $6.1M - **Between rounds:** 4 months ## The rounds - **Oct 2026** Seed **$6.1M** *5 new* *1 returning* [645 Ventures](https://millionrounds.com/fund/645-ventures) Lead [Rebel Fund](https://millionrounds.com/fund/rebel-fund) [January Capital](https://millionrounds.com/fund/january-capital) [Kaz Nejatian](https://millionrounds.com/fund/kaz-nejatian) [FJOR](https://millionrounds.com/fund/fjor) [Sterling Road](https://millionrounds.com/fund/sterling-road) Reported by The SaaS News - **Jun 2026** Venture **Amount undisclosed** *2 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) Source recorded ## 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. **Venture** 2026 **Seed** 2026 [Rebel Fund](https://millionrounds.com/fund/rebel-fund) [645 Ventures](https://millionrounds.com/fund/645-ventures) L [Y Combinator](https://millionrounds.com/fund/y-combinator) [January Capital](https://millionrounds.com/fund/january-capital) [Kaz Nejatian](https://millionrounds.com/fund/kaz-nejatian) [FJOR](https://millionrounds.com/fund/fjor) [Sterling Road](https://millionrounds.com/fund/sterling-road) ## Everyone who backed them [Rebel Fund](https://millionrounds.com/fund/rebel-fund) VC firm **2** rounds [645 Ventures](https://millionrounds.com/fund/645-ventures) VC firm **1** round, led 1 [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round [January Capital](https://millionrounds.com/fund/january-capital) VC firm **1** round [Kaz Nejatian](https://millionrounds.com/fund/kaz-nejatian) VC firm **1** round [FJOR](https://millionrounds.com/fund/fjor) VC firm **1** round [Sterling Road](https://millionrounds.com/fund/sterling-road) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=lightsprint). ## Also claim to have backed them This firm lists Lightsprint 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. [Founder Factor](https://millionrounds.com/fund/founder-factor) VC firm Per its own site ## Quick answers about Lightsprint ### Who invested in Lightsprint? Lightsprint's investors include Rebel Fund, 645 Ventures, Y Combinator, January Capital and Kaz Nejatian, and 2 more on record. 645 Ventures led its latest round. ### How much has Lightsprint raised? Lightsprint has raised $6.1M across 2 rounds since 2026. One round did not disclose an amount, so the total is a floor. ### When did Lightsprint last raise? Lightsprint's most recent round was a Seed of $6.1M in Oct 2026, led by 645 Ventures. ### What was Lightsprint's biggest round? Its most recent round, $6.1M in Oct 2026, is also its largest on record. ### Who backed Lightsprint first? Lightsprint's first round on record, in Jun 2026, was backed by Y Combinator and Rebel Fund. ### What stage is Lightsprint at? Lightsprint's latest named round is a Seed, in Oct 2026. ### Where is Lightsprint based? Lightsprint is based in the United States. ### Who led Lightsprint's rounds? 645 Ventures led the Seed in 2026. ## Companies like Lightsprint In the same sector, and raised in the last eighteen months. [**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**MARC** $5.0M · Oct 2026](https://millionrounds.com/company/marc) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app