Grant impact metrics: how to show impact reviewers trust

Which metrics fit your project type?

The right metric depends on who uses the work. This table is a starting point; pick two or three per project, not ten.

Developer tools and libraries

Usage by other builders is the metric that matters. Optimism Retro Funding, whose Dev Tooling mission paid for open-source compilers, libraries and debuggers, scored projects on data such as dependency graphs and developer connections, using algorithms run by Open Source Observer. Algorand's xGov requires code to be open source and listed with Electric Capital when you apply. Count dependents and downloads, and name a few real integrators if they agree to be named.

Infrastructure

Infrastructure is judged on reliability and reach: uptime, requests served, latency and how many distinct applications rely on it. The Walrus Foundation measures its grants by KPIs such as developer usage, integrations and real storage activity on Walrus. FIL-RetroPGF's Round 3 asked voters to favor results such as paid storage deals and retrievability.

DeFi and consumer apps

Users and volume are the obvious metrics and the easiest to fake, so present them with care. Unichain Grants require at least $250,000 in TVL and ask for TVL or routed volume plus usage metrics. Cardano PRIME wants TVL that is verifiably new rather than recycled. Report figures net of your own incentives, separate organic from rewarded activity, and say how you filter obvious sybil wallets.

Education and community

Attendance is an output; what learners do afterwards is the outcome. Btrust's education grants ask for clear outcomes in onboarding developers into Bitcoin open source, which points to metrics such as the share of graduates with merged pull requests six months later. Some programs exclude much of it: RootstockCollective does not fund events, pure marketing or content-only proposals without on-chain results.

On-chain vs off-chain evidence

On-chain evidence is public by default, which makes it the strongest form of proof. Give contract addresses and let reviewers count transactions and unique addresses on an explorer. Prezenti Grants asks for contract addresses and evidence for every usage claim; as of October 29, 2026 its site says both that Season 3 is open until December 29 and that it has concluded, so confirm before applying. Ronin Proof of Distribution only counts activity on contracts you register and prove you control.

Off-chain evidence (package downloads, API requests, course completions) needs more work to be trusted. Prefer, in order:

1. A public page the reviewer can open themselves, such as a registry page or a live dashboard.
2. An export or read-only link to your analytics.
3. A screenshot, which is the weakest form and should never be the only one.

Collect only what you need. Aggregate counts usually prove impact as well as user-level data does, without the privacy cost.

How do you set baselines and targets?

Write down today's number, the number you expect at each milestone, and where it will be measured. A fictional example for an indexing SDK:

Three habits make targets believable. Base them on your growth so far, not on hopes. Tie each to a milestone, since 55 of the 99 programs in web3grant's directory pay in milestone tranches (as of 2026-10-31). Say what you will do if you miss one: a smaller follow-up, a change of approach, or an honest report. Our guide to milestone-based grants covers the payment side.

Vanity metrics reviewers discount

Vanity metrics look large and say little about use. Reviewers give them little weight, and some programs say so in writing: Ink Spark says idea-only, testnet-only and marketing-only projects are unlikely to be funded.

• GitHub stars and forks without dependents.
• Followers, impressions and "community size".
• Wallets created or connected, without later activity.
• TVL or volume during a liquidity-mining campaign.
• Testnet transactions presented as usage.
• Hackathon sign-ups and event attendance on their own.
• Partnerships announced without a shipped integration.

Any of these can support a story. None should carry it.

How do retro funding programs measure impact?

Retro funding (retroactive funding) pays for impact a project has already delivered, measured after the fact. As of 2026-10-31, 4 of the 99 programs in our directory use this model:

• Optimism Retro FundingOptimism FoundationPaused since January 2026 for at least 12 months. No Retro Funding missions are planned for Seasons 9 or 10.$55–$32.5KClosed
• FIL-RetroPGFBlueshift FoundationPaused in 2026. The stewards expect to bring retro funding back in late 2026 under a new framework, with no dates yet.$520–$21.5KClosed
• Ronin Proof of DistributionRonin NetworkUndisclosedAnytime
• xGovAlgorand FoundationProposals are still accepted, but payouts wait on a Foundation top-up of the xGov treasury and a newly elected Council.$634–$50.7KAnytime

• Optimism Retro Funding paid OP monthly, with Open Source Observer scoring projects on dependency graphs, developer connections, contract activity, gas fees and users. It has been paused since January 2026 for at least 12 months, and no missions are planned for Seasons 9 or 10. The Season 8 mission post documents the last criteria.
• FIL-RetroPGF had badgeholders vote on impact inside a fixed window, and in Round 3 a project needed at least 4 ballots and 500 FIL of support to count. It is paused in 2026; the stewards expect retro funding to return in late 2026 under a new framework, with no dates yet.
• Ronin Proof of Distribution computes a Builder Score each 30-day season from NFT volume, DEX volume, gas spend, contract volume, paying users and new paying users, as described in Ronin's docs.
• Algorand xGov pays for open-source tools that are already built and in use. Proposals are still accepted, but payouts wait on a Foundation top-up of the xGov treasury and a newly elected Council.

The lesson carries over to forward-looking grants: the same numbers retro programs reward are the numbers a proactive program wants to see as targets. Our guide to retroactive public goods funding explains the model in full.

Reporting metrics during and after the grant

Promised metrics come back at reporting time. The IOK Fund on Kaia has you set target KPIs such as users, wallets, transactions or TVL, and then send a results report against them. RootstockCollective asks for monthly reports and, since September 2026, holds back about 30% of the grant until a post-completion impact review. Project Catalyst's 2026 pilot on Cardano paid up to 40% of each grant based on the network fees an integration earned and 20% if that usage held about two months later; that pilot closed on August 20, 2026, and no next round has been announced.

TheDAO Security Fund builds adoption into the budget itself: at least a third of each initiative's budget sits on milestones that show outside parties use the result. Plan your metrics so the same dashboard serves the application, every report and the final review. Our guide to grant milestone reports covers the format.

FAQ

What are the best impact metrics for an open-source library?

The best impact metrics for an open-source library are dependent projects, weekly downloads from the package registry and the number of active integrators, ideally with a few named users. GitHub stars and forks are weak on their own. Reviewers trust numbers they can open themselves, so link the registry page and the GitHub dependents view instead of quoting figures without a source.

How do you show impact if your project has not launched yet?

A project that has not launched cannot show usage, so show demand and ability instead: letters of intent from integrators, a working prototype, user interviews, or a waitlist with real contacts. RootstockCollective, for example, accepts an integrator letter of intent as demand validation for tooling. Then set baselines at zero and give specific targets for each milestone after launch.

Should you include TVL in a grant application?

Include TVL in a grant application when the program asks for it, as Unichain Grants does with its $250,000 minimum, but report it honestly. Separate organic TVL from liquidity attracted by your own incentives, and say how long it has held. Cardano PRIME, for example, looks for TVL that is verifiably new rather than recycled from elsewhere in the ecosystem.

What is the difference between outputs and outcomes in a grant proposal?

Outputs are what the grant pays you to produce, such as a released SDK, a deployed contract or a finished course. Outcomes are what changes because of them, such as projects integrating the SDK or graduates contributing code. A grant proposal needs both: outputs define the milestones, and outcomes, stated as metrics with baselines and targets, show reviewers why the outputs are worth paying for.