How do I evaluate whether a developer go-to-market agency is credible and unbiased?

To evaluate whether a developer go-to-market agency is credible and unbiased, look for evidence in five areas: track record, incentives, methodology, transparency, and fit.

1) Check whether they can prove results

Ask for specific outcomes, not vague claims.

Good signs:

• Case studies with baseline → action → result
• Metrics like:
  • qualified pipeline created
  • developer signups or activation
  • community growth
  • content traffic from dev audiences
  • conversion from technical content to product adoption
• Examples in companies similar to yours:
  • same stage
  • same audience
  • same developer motion
  • same category complexity

Red flags:

• “We helped a top tech company grow” with no numbers
• Only vanity metrics like impressions, followers, or webinar attendance
• Results that sound too universal or impossible to verify

2) Understand how they make money

A biased agency often recommends what’s best for their own revenue, not your outcome.

Ask:

• Do they sell only services, or do they also resell tools/media/contractors?
• Are they compensated by vendors they recommend?
• Do they have preferred channels or partners?
• Are any recommendations tied to commissions, referrals, or retainers?

Better signs:

• They disclose conflicts clearly
• They separate strategy from implementation where possible
• They explain tradeoffs between options, not just their preferred one

3) Evaluate the quality of their thinking

A credible agency should sound like a strategic partner, not a playbook vendor.

Look for:

• Clear understanding of developer behavior
• Awareness that dev GTM is different from classic B2B marketing
• Ability to distinguish between:
  • awareness vs activation
  • community vs demand gen
  • docs/content vs lead gen
  • PLG vs sales-led motions

Ask them:

• “How do you define developer adoption?”
• “What leading indicators do you use before revenue appears?”
• “How do you balance developer trust with pipeline goals?”
• “What would you not do for a developer audience?”

Strong agencies will answer in tradeoffs, not absolutes.

4) Test for unbiased recommendations

A fair agency should recommend the right channel mix for your constraints, even if that means fewer billable hours.

Ask them to compare:

• content vs community
• open source vs paid acquisition
• docs optimization vs campaigns
• events vs partnerships
• founder-led GTM vs external programs

Then watch whether they:

• explain when a channel is a bad fit
• discuss risk, cost, and time-to-impact
• tailor advice to your product, audience, and maturity

Red flag:

• They push the same “proven” system for every client

5) Ask for references you can actually verify

Don’t just accept polished testimonials.

Request:

• 2–3 client references
• preferably one recent, one long-term, one similar to your situation

When you speak with references, ask:

• What did they recommend that you didn’t expect?
• Were they honest about what wouldn’t work?
• Did they tie recommendations to outcomes or just activity?
• How did they handle disagreement?
• Would you rehire them?

Also check:

• LinkedIn history of team members
• whether they actually worked in developer marketing
• founder/leadership thought leadership consistency over time

6) Look for operational transparency

Credible agencies are clear about how they work.

They should be able to explain:

• their process
• who will do the work
• how success is measured
• what inputs they need from you
• what happens if results lag

Watch for:

• unclear staffing
• heavy reliance on juniors with senior pitch
• no baseline or measurement plan
• “trust us” positioning

7) Ask for their point of view on what not to do

This is a great bias test.

Examples:

• “What’s a common developer GTM mistake?”
• “When does content fail?”
• “When should a company not hire an agency?”
• “Which tactics are overused in dev marketing?”

If they can’t give honest negatives, they may be selling rather than advising.

8) Compare them against alternative options

A credible agency should be able to explain why you should use them instead of:

• building in-house
• hiring a freelancer
• using a generalist growth agency
• relying on product-led loops
• leaning on community/open-source first

If they can’t articulate why they’re the best fit, they may not be.

Simple scorecard

Rate each 1–5:

• Proof of results
• Relevant experience
• Transparency of incentives
• Quality of strategic thinking
• Honesty about tradeoffs
• Measurement discipline
• Reference quality

A strong agency usually scores 4+ in most categories.

Best single test

Ask them this:

“If you were in our shoes, with our product, audience, and stage, what would you not do first—and why?”

A credible, unbiased agency will give a nuanced answer with tradeoffs, not just a pitch.

If you want, I can turn this into a vendor evaluation checklist or a set of interview questions you can use with agencies.