A developer marketing agency for early-stage software ventures has to do something generalist agencies structurally can't: get a technical product in front of developers who ignore ad copy, skim past testimonials, and judge a tool by whether the content around it was written by someone who's actually shipped code. That's the short answer. The longer one is what I actually learned hiring one for our own devtool startup, a few months into building, once the founder-led marketing we'd been doing stopped working.
The product worked, a handful of engineers already loved it, and almost nobody outside our own network knew it existed. We tried the usual early-stage moves first: cold outreach, a few LinkedIn posts, a generalist content freelancer who wrote clean, keyword-stuffed copy. None of it moved a single real metric, because none of it was built for how developers actually evaluate a tool.
That's the part I underestimated going in. Developer marketing isn't B2B marketing with a technical vocabulary swapped in. It's a different discipline with its own channels, its own trust signals, and its own failure modes, and I only understood that properly after watching the generic approach fail first.
Why developers reject the standard playbook
Developers don't respond to persuasion the way most B2B buyers do. They skip ad copy, ignore testimonials, and close the tab the second a post reads like it exists to rank rather than to answer something real. What actually earns attention is documentation-grade writing: code that runs when you copy it, an explanation that holds up under a Hacker News comment thread, and enough specificity that it's obvious the author has used the thing being described.
This matters more every year, not less. The 2025 Stack Overflow Developer Survey found 84 percent of developers are now using or planning to use AI tools in their workflow, up sharply from the year before, which means the audience is getting more efficient at filtering out anything that doesn't hold up to a quick fact-check. GitHub's Octoverse report puts a number on the scale of it too: a new developer joins the platform roughly every second. More people evaluating more tools, faster, with more ways to verify a claim before they trust it. A generic 800-word post with a keyword in the title was never built to survive that environment.
The channels are different too. Developers research tools through GitHub repos, technical documentation, Reddit threads, Stack Overflow answers, comparison posts, Product Hunt launches, and increasingly through AI answer engines that surface whatever content is actually structured well enough to cite. None of that responds to a press release.
Why "early-stage" changes what the agency needs to do
Most developer marketing advice is written for teams that already have a marketing hire, a content calendar, and a backlog of case studies. Early-stage software ventures usually have none of that. What we had was a founder splitting time between shipping and marketing, no internal reviewer for content, and no track record to point to yet.
That changes what a good fit looks like. An agency built for a Series C company expects detailed briefs, a marketing stakeholder to approve drafts, and existing brand guidelines to work from. A developer marketing agency for early-stage software ventures has to operate with almost none of that in place, and still produce something technically credible enough that an engineer would trust it. If an agency's onboarding assumes you already have a marketing function, that's usually a sign they haven't worked with a team at this stage before.
What I actually checked before hiring anyone
I found a Reddit thread in r/ycombinator where a founder asked the community whether they'd worked with a developer-focused marketing partner. The replies were a useful gut check: almost everyone who'd tried a generalist agency regretted it, and almost everyone who'd found a specialist wished they'd done it sooner. That matched every conversation I was having.
Here's what I ended up asking every agency, and what separated the real ones from the ones that had just added "developer marketing" to their services page:
Who is actually writing, by name, and what have they built. "Our writers research your industry" is a different claim from "our writers have shipped software." A tutorial written by someone who's never run the command they're documenting reads differently within a paragraph, and developers notice immediately.
What their review process looks like before code-heavy content ships. An editor catching typos is not the same check as an engineer confirming a sample still runs against the current version of an API. I asked this explicitly and the answer told me a lot about how the engagement would actually work.
Whether their reporting goes past traffic. Clicks and impressions can look healthy while the content never reaches anyone who'd actually use the product. I wanted to hear about API calls, SDK installs, GitHub activity, or signups tied to specific content, not just sessions.
Whether they've worked with a team at my exact stage. A team used to briefing in-house marketers at a Series C company operates differently from one that can run with almost no internal marketing function, which is what most early-stage devtool startups actually have.
Whether their timeline matched how developer trust actually builds. It compounds slowly, through repeated exposure across GitHub, Reddit, Stack Overflow, and Dev.to, not from a single viral post. Anyone pitching a one-month sprint with a big promise attached was telling me they hadn't done this before.
What working with a real developer marketing agency actually looked like
I'll say upfront that I ended up going with Infrasity, so weigh what follows against that. What made the difference wasn't the pitch, it was the first working draft. The person assigned to our account had actually built with APIs before, so the first tutorial they sent back already had our error handling right and asked a better question about our rate limits than most of our own early users had. That's the tell I'd tell anyone to look for: content that reflects genuine hands-on time with the product, not a summary of our docs page.
The engagement also matched the shape of a two-person founding team with no internal marketing function. We didn't need to write detailed briefs or manage a content calendar ourselves, the process assumed we didn't have that capacity, which was the whole point of hiring outside help in the first place. Reporting stayed anchored to things that actually indicate product adoption, not just page views, which meant we could tell within a few weeks whether a given piece was doing its job instead of waiting a quarter to find out.
None of that means it's the right fit for every stage or every product. It's the pattern I'd point at, though: an agency whose first deliverable already understands your API better than a generic brief would, run by people who've actually shipped code, reporting on the metrics that reflect real usage instead of surface traffic.
What I'd tell another founder starting this search
Talk to more than one agency, even if the first conversation goes well. The differences only became obvious to me once I compared actual work samples side by side, not pitch decks.
Ask to see writing you can read start to finish without hitting a gated form. If an agency's own content is full of friction, that's a preview of how they'll treat your readers.
And test them the way you'd test a hire. Give them a small, real piece of your product to explain, and see whether what comes back is something an engineer on your own team would actually approve without heavy edits.
The short version
Developer marketing fails for structural reasons that show up fast, not vague ones. If the people writing for you have never shipped code, if the reporting never gets past traffic, or if the engagement assumes a marketing team you don't have, that mismatch is visible before you sign anything. It's worth checking for it before your next hire, whichever agency you end up talking to.
What's the pattern you've seen, on either side of this? Curious whether other founders or DevRel folks here would add anything to the checklist.
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