Monthly roundup · Developer Tools · October 2026

Developer Tools startup funding, October 2026: Flapping Airplanes's $1.0B Series A leads 16 rounds

By Millionrounds ResearchPublished 1 November 2026

We read 16 equity rounds in Developer Tools announced in October 2026, raising $1.4B between them: 2% of all the rounds we read that month and 2% of the money. The largest was Flapping Airplanes's $1.0B Series A, led by Index Ventures and Lux Capital. The median seed round was $7.0M, against $5.5M over the last twelve months across all sectors; at Series A it was $38M.

Equity rounds16in Developer Tools, 16 with an amount
Raised$1.4Bacross those rounds
Lead named100%of rounds say who led
Share of the month2%of rounds; 2% of the money

The biggest rounds

  1. 1Flapping AirplanesSeries A · United States · led by Index Ventures, Lux Capital$1.0B
  2. 2SupabaseGrowth · United States · led by GIC$150M
  3. 3DaytonaSeries B · Croatia · led by FirstMark$60M
  4. 4NamespaceSeries B · United States · led by Scale Venture Partners$42M
  5. 5InfisicalSeries B · United States · led by Elad Gil$40M
  6. 6BraidSeries A · Netherlands · led by Octopus Ventures$38M
  7. 7PPreference ModelSeed · led by Andreessen Horowitz$16M
  8. 8MeticulousSeries A · United States · led by Chemistry$15M
  9. 9PParadevSeed · United States · led by Union Square Ventures$12M
  10. 10Swamp ClubSeed · United States · led by Amplify Partners$7.0M

Day by day

Equity rounds in Developer Tools announced each day of October. The busiest day was 14 October, with 2.

1 October31 October

By stage, against the year

Each stage's median this month beside its twelve-month median: the sector's own where we hold enough rounds for a benchmark, otherwise the one across all sectors.

Pre-seed4$2.4Mthis month$2.0M12 months, all sectors
Seed5$7.0Mthis month$5.5M12 months, all sectors
Series A3$38Mthis month$20M12 months, all sectors
Series B3$42Mthis month$50M12 months, all sectors
Growth1$150Mthis month$113M12 months, all sectors

Where

United States had the most Developer Tools rounds this month.

Against the month

  • Rounds, Developer Tools16
  • Rounds, all sectors733
  • Raised, Developer Tools$1.4B
  • Raised, all sectors$59B

The whole of October 2026

Other sectors in October

411 roundsAI→100 roundsFintech→72 roundsHealthcare→67 roundsSoftware→67 roundsRobotics→56 roundsManufacturing→44 roundsSaaS→44 roundsConstruction→42 roundsHardware & Electronics→41 roundsBiotech→34 roundsBig Data & Analytics→33 roundsEnergy→33 roundsLogistics→32 roundsEnterprise Software→29 roundsAerospace & Space→29 roundsHealthtech→28 roundsCybersecurity→26 roundsDefence Tech→25 roundsCloud→24 roundsEntertainment→23 roundsB2C→23 roundsFinancial Services→22 roundsMedical Devices→20 roundsCleantech→19 roundsE-commerce→19 roundsFood & Beverage→18 roundsReal Estate→18 roundsDeeptech→18 roundsSemiconductors→17 roundsAgtech→15 roundsWeb3 & Crypto→15 roundsRetail→15 roundsMartech→14 roundsSupply Chain→14 roundsInsurtech→14 roundsTelecoms→14 roundsClimate Tech→13 roundsRegtech→13 roundsAutomotive & EVs→13 roundsChemicals & Materials→12 roundsFuture of Work→12 roundsB2B→12 roundsMedia→12 roundsGaming→11 roundsProfessional Services→11 roundsMarketplaces→11 roundsHR Tech→11 roundsEducation→11 roundsSalestech→10 roundsProptech→10 roundsPharma→10 roundsFashion→10 roundsTravel & Hospitality→