The archive · Climate & Energy · Strategic decision · 2019–2026
Watershed bets disclosure rules make carbon accounting a must-buy; $100M Series C at $1.8B
Watershed bet EU CSRD and California's SB 253 would make carbon reporting audit-grade compliance; it became climate software's most valuable company at $1.8B.
Watershed
What the business is
Enterprise software that measures a company's full carbon footprint (scope 1-3), produces audit-ready sustainability reports, runs emissions-reduction programs, and offers a marketplace for carbon credits and clean-power purchases.
Starting capital：Series C of $100M at a $1.8B valuation in February 2024, led by Greenoaks; total disclosed funding $239M per CNBC.
How it started
Watershed was founded in San Francisco in 2019 by Christian Anderson, Taylor Francis and Avi Itskovich, engineers from Stripe who saw that companies making net-zero pledges had no rigorous way to measure them. At its Series B in 2022 its customers managed an estimated 20 million tonnes of CO2e. The founding bet was that climate disclosure would follow the same path as financial accounting — voluntary at first, then legally required.
What happened
The mandate arrived on schedule. The EU's Corporate Sustainability Reporting Directive made 2024 the first year of government-mandated climate disclosure for nearly 12,000 companies, and California's SB 253, signed in 2023, set its first emissions-reporting deadline for 2026. In February 2024 Watershed raised a $100M Series C led by Greenoaks at a $1.8B valuation — the most valuable climate software company — with customers including General Mills, Carlyle, BBVA, Paramount, Block and four of the top six US banks, whose operations it said managed an estimated 479 million tonnes of CO2e, up more than 10x in a year.
How it ended up
Still scaling as of September 2026: in May 2025 Watershed made its CEDA emissions database free as Open CEDA; in October 2025 it launched AI-accelerated SB 261 climate-risk reporting and a Guaranteed Assurance program for SB 253; and in August 2026 it was marketing tools for the law's first filing deadline of November 10, 2026, with 70 of the Fortune 500 among its in-scope customers.
Background
Watershed's bet was that corporate climate disclosure would follow the path of financial accounting: voluntary at first, then mandatory. Founded in San Francisco in 2019 by Christian Anderson, Taylor Francis and Avi Itskovich — engineers from Stripe — the company built enterprise software to measure a company's scope 1-3 emissions, produce audit-ready sustainability reports and run reduction programs, and then sold it to companies that had made net-zero pledges without the systems to back them up.
The market the founders predicted arrived on schedule. The EU's Corporate Sustainability Reporting Directive made 2024 the first year of government-mandated climate disclosure for nearly 12,000 companies, and California's SB 253 — signed into law in 2023 — set its first emissions-reporting deadline for November 2026. In February 2024, Watershed raised a $100M Series C led by Greenoaks at a $1.8B valuation, becoming what it said was the most valuable climate software company in the world.
The numbers behind that valuation were regulatory-led: customers including General Mills, Carlyle, BBVA, Paramount, Block and four of the top six US banks, with those customers' operations managing an estimated 479 million tonnes of CO2e — up more than 10x in a year. Watershed's 2023 acquisition of CEDA, a multi-regional emissions database, underpinned its measurement claims, and CNBC put the company at number 48 on its 2024 Disruptor 50 list with $239M in total funding.
As the compliance deadlines arrived, Watershed productized them: in May 2025 it released a free version of its emissions database (Open CEDA), in October 2025 it announced AI-accelerated SB 261 reporting and a Guaranteed Assurance program for SB 253, and by August 2026 it was marketing tools for the first SB 253 filing deadline of November 10, 2026, saying 70 of the Fortune 500 were among its in-scope customers.
What has to be true
- Companies with net-zero pledges had no rigorous way to measure emissions, and regulators were clearly heading toward mandatory disclosure.
- The EU CSRD (first reporting year 2024) and California SB 253 (first filing November 2026) turned voluntary climate accounting into a legal obligation for thousands of companies.
- Ex-Stripe founders applied fintech-grade data engineering to emissions, and the 2023 CEDA acquisition gave Watershed proprietary multi-regional emissions data.
- Watershed's $100M Series C at a $1.8B valuation showed investors agreed that disclosure mandates would create a durable software category.
- Its customers' managed emissions growing to an estimated 479 million tonnes of CO2e gave the platform scale and lock-in ahead of the filing deadlines.
What can be applied
When a regulation is clearly coming, build the product the deadline will force companies to buy — and make the data solid enough to survive auditors once the law lands.
Aftermath
As of September 2026, Watershed is scaling ahead of the deadlines it bet on: California's SB 253 first filings are due November 10, 2026, Scope 3 reporting and limited assurance follow in 2027, and Watershed sells AI-accelerated SB 261 reporting plus a Guaranteed Assurance program for SB 253 (waiving up to $250,000 in fees if a customer fails third-party verification). It also opened its CEDA emissions database to the public as Open CEDA in May 2025, with Amazon, WWF and PCAF as endorsers, and continues to serve enterprise customers including 70 of the Fortune 500.
Sources
- Watershed Announces $100M in New Funding as Corporate Climate Action Accelerates
- 48. Watershed — CNBC Disruptor 50
- Watershed Opens Global Emissions Database to Drive Better Climate Decisions
- Announcing AI-accelerated reporting and Guaranteed Assurance program for California disclosure
- California SB 253: Updated Compliance Timeline And Key Steps For Companies
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