Tech Startups in Boulder
Every active Boulder startup we currently index, sorted by score and momentum.
About startups in Boulder
Boulder is home to 6 tech startups indexed on techstartupslist.com. This page lists every active Boulder company we track, with logos, taglines, and direct links to each company's site — no paywalled middleman. Notable Boulder startups in the index include Arpeggio Bio, Bonsai, Flightfox, Foundation, and LightTwist. Each profile surfaces team size, founding year, category, and any open roles their careers page is publicly scrapable for. The Boulder cohort leans toward Healthcare, Dev Tools, and Productivity, reflecting how the local startup ecosystem is concentrated. Recurring tags across these companies: Biotech, SaaS, B2B, Genomics, Drug discovery. The directory's filter UI accepts any of them as a query. Y Combinator batches represented in Boulder: S19, W16, S12, and S23, among others. Jump to the per-batch landing pages for batch-specific cohort views. the listing refreshes whenever the scrape runs so this stays current as Boulder companies launch, raise, and ship. For roles open at these companies, see /jobs/location/boulder — every apply link goes to the company's own site, not an aggregator.
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Frequently asked questions
How many tech startups are based in Boulder?
Our index currently tracks 6 active tech startups based in Boulder. New entries appear automatically as they're discovered through our scrapers; shutdowns are flagged inactive and hidden from this listing.
What are the top tech startups in Boulder?
Among the Boulder startups indexed here: Arpeggio Bio, Bonsai, and Flightfox, plus 3 more on this page. Sorting prioritizes curated score and trending signals.
Where can I find startup jobs in Boulder?
Open roles at indexed Boulder startups appear on /jobs/location/boulder. Each role links directly to the company's official application page.
How often is the Boulder startup list updated?
Automated scrapers refresh this page on the same daily cadence as the rest of the directory. The last index update was 2026-07-17.