Sierra funding rounds & valuation history
Sierra, the San Francisco customer-service AI agent company co-founded by Bret Taylor and Clay Bavor. Funding from the Early funding (Sequoia, Benchmark) to the Series E (May 2026), sourced to CNBC, TechCrunch, Sierra and Fortune.
Round history
Newest first. Dashed badges and striped rows are not closed transactions. “—” means the source does not disclose the figure or it cannot be computed on the same basis; see the note in each row.
| Date | Status | Round | Amount | Lead / buyer | Valuation | Val. ÷ run-rate | Source |
|---|---|---|---|---|---|---|---|
Closed round |
Series EBenchmark, Sequoia, Greenoaks and other existing investors participated (CNBC). |
$950M |
Tiger GlobalWith: GV |
$15.8BPost-money, reported (CNBC)1.58× vs prior closed |
—Not disclosedNo run-rate stated in the announcement |
||
Closed round |
Growth round (Sep 2025) |
$350M |
Greenoaks |
$10BStated by Sierra2.22× vs prior closed |
—Not disclosedNo run-rate stated in the announcement |
||
Closed round |
Growth round (Oct 2024) |
$175M |
Greenoaks |
$4.5BReported (TechCrunch) |
—Not disclosedNo run-rate stated in the announcement |
||
Closed round |
Early funding (Sequoia, Benchmark)Disclosed at launch in February 2024 as a cumulative total (Fortune). |
$110M |
Sequoia CapitalWith: Benchmark |
Not disclosedNo company valuation stated by the source |
—Not disclosedNo run-rate stated in the announcement |
Valuation at each closed round
Valuations as stated or reported at each closed round with a disclosed figure; talks, tenders and filings are not plotted.
Sources: CNBC, TechCrunch, Sierra, Fortune. US$ billions, linear scale.
Timeline
Each round and share sale, oldest first.
- Feb 2024 · Closed
Early funding (Sequoia, Benchmark): $110M led by Sequoia Capital.
- 28 Oct 2024 · Closed
Growth round (Oct 2024): $175M at $4.5B led by Greenoaks.
- 4 Sep 2025 · Closed
Growth round (Sep 2025): $350M at $10B led by Greenoaks.
- 4 May 2026 · Closed
Series E: $950M at $15.8B led by Tiger Global.
Cite this dataset
Free to quote with a link back. Copy this citation:
Sierra Funding Rounds & Valuation History. Private Valuation & Funding Round Tracker, GrowthNavigateFunding.net, updated 14 Nov 2026. https://growthnavigatefunding.net/funding/sierra/
Download the data
The same 4 rows as the table: numeric US$ columns, empty cells where a figure is not disclosed, and a source URL for every row.
- File
sierra-rounds.csv(UTF-8, comma-separated)- Stable URL
https://growthnavigatefunding.net/wp-content/uploads/2026/11/sierra-rounds.csv- Columns
id,date,date_precision,status,transaction_type,round,amount_usd_low,amount_usd_high,lead_or_buyer,co_leads,valuation_usd_low,valuation_usd_high,valuation_basis,valuation_to_run_rate_multiple,multiple_bound,multiple_basis,step_up_vs_prior_closed,price_per_share_usd_low,price_per_share_usd_high,shares,source,source_url,other_source_urls,notes,last_updated- Updated
- (IST)
Methodology & status definitions
How each row is labelled and calculated.
Closed round
A primary round announced by the company or confirmed in the press, bringing new money to the company.
Valuation ÷ run-rate
Post-money valuation ÷ the run-rate the company stated in that announcement (GNF calc.). Where the run-rate is “crossed” or “over” a figure, the multiple is shown as “under X×”. No row qualifies here unless shown, so no multiple is invented.
What is not a separate row
Employee tender offers and secondary sales.
Updates & corrections
This page stays at one address and is updated in place; the “Last updated” date above drives the citation and the dataset metadata. Corrections: hello@growthnavigatefunding.net. Informational only; not investment advice.
Changelog
- : Dataset first compiled (AI-50 batch, not yet published).
Sources
- CNBC: Bret Taylor's Sierra raises nearly $1 billion months after last capital push, 4 May 2026
- TechCrunch: Sierra raises $950M as the race to own enterprise AI gets serious, 4 May 2026
- Sierra: There's an agent for that, and it runs on Sierra, 4 Sep 2025
- CNBC: Bret Taylor's Sierra is the latest $10 billion AI startup, 4 Sep 2025
- TechCrunch: Bret Taylor's Sierra raises $350M at a $10B valuation, 4 Sep 2025
- TechCrunch: Bret Taylor's customer service AI startup just raised $175M, 28 Oct 2024
- Fortune: Ex-Salesforce Co-CEO Bret Taylor launches AI startup Sierra, 13 Feb 2024