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workerd

workerd

workerd is an open-source JavaScript and WebAssembly runtime built on Cloudflare's production infrastructure

Developer Tools·by Cloudflare, Inc.·Launched Apr 2026·Profile + Activity 21.6·0 upvotes·github.com
Upvote0Visit Website
LivenessActiveRank#232 of 1000Last commitSO tag heatPress sentiment 7dHiringCohort 2026+0.0 WoW

What it is

workerd is an open-source JavaScript and WebAssembly runtime built on Cloudflare's production infrastructure. It enables developers to run server-side JavaScript applications with the same capabilities that power Cloudflare Workers at scale.

Signal score

vs category avg: +10.3
21.6+0.0 WoW
255075100MarMayJuntodayavg 11.321.6

Funding history

2 rounds
Total raised
$152.1M
Latest valuation
$3.1B
Stage
late
Lead investors: Union Square Ventures · Union Square Ventures · Franklin Templeton Investments · Franklin Templeton Investments · New Enterprise Associates (NEA)
Series E
Mar 2019
Franklin Templeton Investments, New Enterprise Associates (NEA), Union Square Ventures
Valuation: $3.1B
$150.0M
source
Seed
Nov 2009
investors undisclosed
$2.0M
SEC
Data from SEC EDGAR Form D filings and press coverage. Round labels for SEC filings are inferred from filing sequence and amount.

Moat

Updated May 2026
Data moat
strong

Cloudflare leverages its extensive visibility into global web traffic to generate unique threat intelligence data, creating a strong competitive moat that enhances its security features beyond those available to competitors.

4 sources
  • Cloudflare sees a massive percentage of global web traffic. That visibility gives them threat intelligence data that no pure-play security company can match. source
  • Proprietary data assets are about having unique datasets that power your core value proposition. source
  • If you have data nobody else has, your AI features will be better in ways competitors can’t copy by writing better code. source
  • The curation moat is underrated. Everyone has access to the same public data. But the company that spent three years hand-labeling edge cases... has an asset that can’t be replicated with a web scraper and an API call. source
Confidence 80% · classified by firecrawl-extract

Press mentions

0 lifetime · 0 shown

No press mentions found.

Discussion 0 comments

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Vitalslive · 00:31 UTC
Profile + Activity
21.6
profile only
Rank in cat
#232 / 1000
Upvotes
Press 30d
Founders
Matthew Prince
Liveness probedaily 04:30 UTC
Active · 200 OK
github.com · last 15:41 UTC
Probe history · 7 probes
Jun 16latest
GitHub activitydaily 04:15 UTC

No GitHub data available

Stack Overflow tag heat2026-06-17
Category tags · 30d questions
python
283
typescript
44
node.js
41
postgresql
33
next.js
24
angular
22
rust
21
docker
20
react
19
django
14
flask
9
mongodb
9
kubernetes
7
go
7
fastapi
6
vue.js
5
redis
4
terraform
3
angularjs
2
svelte
1
Top tag lifetime2,219,876
Press sentiment · 7d rollinghourly

No press mentions in the last 7 days.

Cohort survival · Class of 2026weekly

291 products launched in 2026 · 100% still active

291 active0 sunset
Still active
100%
Median lifespan
4.9y