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OpStop Blog — Defense BD Intelligence

Practical intelligence for small defense companies pursuing SBIR, AFWERX, DIU, and DARPA contracts. No fluff. Just what works.

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AFWERX 2026: Which SBIR Topics Small Companies Are Actually Winning

AFWERX's rolling admission model is a genuine advantage — but only if you know which topics are actually accessible versus which ones have been structured to favor established primes. We break down the 2026 landscape.

June 2026 · 7 min
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The 5 Best Sources for Early DIU & DARPA Opportunities (Ranked)

Where to find DIU and DARPA solicitations before everyone else — ranked by reliability, speed, and relevance matching. Includes what each source misses and the optimal stack for small defense companies.

June 2026 · 8 min
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SBIR Matching Done Right: Stop Wasting Time on Bad-Fit Topics

The 5 signals a topic is a bad fit. The 3 signals you should pursue it. How to build a scoring system that filters 300+ open topics down to the 5 worth actually writing proposals for.

June 2026 · 8 min
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How Defense Startups Build a BD Pipeline on $20/Month

The exact tool stack, weekly rhythm, and three meeting types that small defense companies use to win SBIR Phase IIs and OTA prototypes without spending $10K/year on GovWin IQ.

June 2026 · 9 min
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SBIR Phase III: The Sole-Source Pathway Most Companies Miss

Phase III isn't a separate competition — it's a sole-source authority baked into the SBIR statute. Most companies that have won Phase I and Phase II don't know how to use it. This is the playbook.

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