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Q2 2026 · Series A / Series B
Growth-stage technical startups that have closed institutional rounds. Engineering signals at this stage are less about discovery and more about validation of trajectory. Currently tracking 21 series a / series b startups across 10 sectors. castle-engine leads with 40 commits over 14 days (+344%).
Investor insight
At Series A/B, engineering acceleration is a trajectory signal rather than a discovery signal. A hiring burst or platform buildout often precedes the next round. Institutional investors use these signals to prioritize outreach and refine conviction before a lead term sheet.
EdTech
4 series a / series b startups
Cybersecurity
3 series a / series b startups
Healthcare
3 series a / series b startups
Web3
3 series a / series b startups
Gaming
2 series a / series b startups
Space Tech
2 series a / series b startups
Fintech
1 series a / series b startup
Climate Tech
1 series a / series b startup
Supply Chain
1 series a / series b startup
Data Infrastructure
1 series a / series b startup
Sorted by commit velocity change (14-day window). Stage from contributor count + enrichment data. Last updated Q2 2026.
The free Acceleration Watch: five venture-backed teams accelerating on the engineering signal, translated into plain English — 21 to 47 days before the deck circulates. No code-reading, no card.
In Q2 2026, castle-engine (Gaming) leads series a / series b startups with 40 commits over a rolling 14-day window (+344% change) and 24 active contributors. Across all 21 tracked series a / series b startups, the average 14-day commit velocity is 78 commits. The dominant engineering signal pattern is "Framework migration".
At Series A/B, engineering acceleration is a trajectory signal rather than a discovery signal. A hiring burst or platform buildout often precedes the next round. Institutional investors use these signals to prioritize outreach and refine conviction before a lead term sheet.
In Q2 2026, the top sectors by series a / series b startup count are EdTech (4), Cybersecurity (3), Healthcare (3), Web3 (3), Gaming (2). Each sector page has its own ranked list and sector-specific context.
Stage is derived from contributor count, team-size enrichment data, and funding history where publicly available. Stage classifications use broad buckets (Pre-Seed, Seed, Series A/B, Growth) to provide meaningful sample sizes. These are estimates — always verify independently before any investment action.