DARPA is not a typical government customer. It does not buy office supplies or facility maintenance contracts. It funds the future. The agency invented the internet (ARPANET), GPS, stealth aircraft, and mRNA vaccine delivery platforms. Its annual procurement runs $4 billion or more, and nearly all of that money goes to research, development, and prototyping work that does not exist yet.
That creates a genuine opening for small and diverse businesses. DARPA actively wants new vendors with unconventional ideas. The agency's structure is designed to move fast and avoid the institutional inertia that slows most federal buyers. If your business has real technical depth, DARPA is worth pursuing.
What DARPA actually buys
DARPA's budget funds three categories of work almost entirely: basic research (6.1), applied research (6.2), and advanced technology development (6.3). These are DoD budget activity codes, and they translate to real work for contractors.
The top NAICS codes are 541715 (Research and Development in the Physical, Engineering, and Life Sciences, except Nanotechnology and Biotechnology), 541330 (Engineering Services), and 334511 (Search, Detection, Navigation, Guidance, Aeronautical Systems). If your business works in AI and machine learning, quantum computing, autonomous systems, biotechnology, microelectronics, or hypersonics, you are already in the right lane.
Contract sizes vary significantly by program. A Small Business Innovation Research (SBIR) Phase I award runs $50,000 to $250,000 for a six-month feasibility study. Phase II can reach $1.5 million to $2 million for two years of development. On the large program side, DARPA issues contracts worth $10 million to $100 million or more. Most first-time vendors enter through SBIR or a Broad Agency Announcement (BAA), not a large program office contract.
DARPA does not issue requests for proposals in the traditional sense. It publishes Broad Agency Announcements that describe technical problems, not specifications. You respond with a technical approach, not a quote. That changes everything about how you compete.
How registration works
Start with SAM.gov. You need an active registration before DARPA can award you a contract. The registration requires a Unique Entity Identifier (UEI), a CAGE code, and current representations and certifications. If you already hold a federal certification (8(a), WOSB, SDVOSB, HUBZone), make sure those designations are accurately reflected in SAM.gov under your business profile.
After SAM.gov, create a profile in the System for Award Management and register on beta.SAM.gov (which consolidates legacy systems like FedBizOpps). DARPA posts its BAAs on SAM.gov and on its own website at darpa.mil. Set up email alerts for DARPA on SAM.gov so you see solicitations the day they drop.
DARPA has a dedicated small business program. The agency participates in the DoD SBIR/STTR program, which publishes solicitations three times per year. Each DARPA program office proposes SBIR topics independently, so the topics change every cycle. Monitor the DoD SBIR/STTR portal at dodsbirsttr.mil alongside DARPA's own BAA feed.
The DARPA small business office
The Small Business Programs Office at DARPA is your first point of contact. This office advises small businesses on how to compete for DARPA contracts, which BAAs are appropriate for your capabilities, and how the proposal process works. The office can also connect you with specific program managers when a match is plausible.
Reach the small business office through the contact page at darpa.mil. The agency does not publish a direct phone line to the small business office on most public-facing pages, but the website provides a general contact form and office-specific email routing. For SBIR specifically, contact information is listed directly in each solicitation package on dodsbirsttr.mil.
One thing to understand about DARPA's structure: program managers (PMs) hold real authority. They run individual programs, control budgets, and decide which proposals get funded. A program manager at DARPA is often a leading scientist or engineer on a four-to-six year appointment from industry or academia. They come in with an agenda, fund the work that fits it, and leave. If you can have a conversation with the relevant PM before a BAA closes, your proposal will be sharper. DARPA encourages this. The agency explicitly allows pre-submission conversations with PMs, unlike many federal buyers.
Set-aside and diversity opportunities
DARPA participates in the DoD SBIR and STTR programs, which set aside funding specifically for small businesses. Phase I SBIR contracts are reserved exclusively for small businesses. Phase II and Phase III can involve larger primes, but small businesses retain IP rights from Phase I and II work, which gives you leverage in Phase III licensing.
DARPA does not run a separate supplier diversity certification program, but your certifications matter in two ways. First, if you hold an 8(a) certification from SBA, you are eligible for sole-source awards when contract values fall within the 8(a) threshold ($4.5 million for non-manufacturing, $7 million for manufacturing). Some DARPA program offices use this authority for follow-on work with proven small business vendors. Second, DARPA's performance against small business goals is tracked and reported, so the agency has institutional incentive to identify and develop small business sources.
The DARPA Mentor-Protégé Program connects large prime contractors with small businesses. If you are working as a subcontractor to a DARPA prime, ask whether the prime participates in the program. Participation can generate real development support and a path toward prime contract work.
Your first contract with DARPA: respond to a BAA
The practical entry point for most businesses is a DARPA BAA response. Pick one. DARPA publishes multiple BAAs per year across its six technical offices: Defense Sciences, Information Innovation, Microsystems Technology, Biological Technologies, Strategic Technology, and Tactical Technology.
When you find a BAA that fits your technical work, read the full solicitation before you write a word. DARPA BAAs specify the technical areas, the performance period, evaluation criteria, and any restrictions on proposers. Some are open to all businesses. Some are restricted to domestic entities or require specific security clearances.
Your proposal needs to answer one question clearly: why is your approach likely to succeed when others have failed? DARPA funds high-risk, high-reward research. The agency is not looking for incremental improvements. Program managers read dozens of proposals. The ones that advance state a specific technical insight, explain why it changes the odds, and show that the team can execute.
Keep the technical volume tight. DARPA evaluators are domain experts. Padded proposals do not impress them. A focused 15-page proposal often beats a sprawling 40-page document.
Submit on time. DARPA does not grant extensions. Solicitations close on the date listed, and late submissions are not considered.
Where to start today
Pull up darpa.mil and review the open BAAs under each technical office. Cross-reference with your SAM.gov NAICS codes. If you see a technical area that matches your actual work, download the full solicitation and read the evaluation criteria. Then contact the DARPA Small Business Programs Office to ask whether a pre-submission conversation with the relevant PM is appropriate for that BAA.
If no current BAA fits, register on dodsbirsttr.mil and set an alert for the next DARPA SBIR cycle. Topics are published roughly in November, April, and August. The next cycle is your on-ramp.
DARPA moves fast for a federal agency. Expect 60 to 90 days from BAA close to award decision on competitive selections. If you win a Phase I SBIR, treat that award as a relationship, not a transaction. The path from Phase I to Phase II to a larger program contract is real, and it starts with delivering technically credible work on your first award.
