Open Attrib vs Cometly
Cometly is B2B SaaS teams that need attribution to reach closed-won revenue in the CRM, not just the order. Open Attrib is B2B teams that want the lead-to-revenue join in a database they can query — hosted at a flat price, or on a box they run. Both do first-party multi-touch attribution; the difference that decides it is how you are billed — Cometly scales its price with your revenue, while Open Attrib is one flat price whatever you spend: $499/mo hosted on Cloud, or $997 once on a server you control.
Where the two actually differ.
Eight questions that decide the purchase. The right-hand column is what Cometly publishes about itself, not this site's opinion of it.
| Open Attrib | Cometly | |
|---|---|---|
| What it costs | $499/mo flat on Cloud, or $997 once self-hosted. | usage-based on tracked monthly pageviews, with Core and Enterprise sold on a call and 20% off for annual billing |
| How you are billed | One flat price whatever you spend — $499/mo hosted, or $997 once on your box. No seat count, no per-event charge and no share of your revenue. | A subscription sized by monthly pageviews, monthly or annual, with the tier auto-promoted when you cross 90% of the allowance. |
| Where it runs | Cloud: on our servers, nothing to run. Licence: your own server or VPS, where Docker Compose brings up Postgres, the API, the worker and TLS together. | Their cloud. You reach it through a browser and they operate it. |
| Where your data lives | Cloud: in our Postgres. Licence: in your Postgres, on your box. Either way the only thing sent on is the conversion you choose to send back to an ad platform, through Zernio if you connected the ad account there. | In their database, under their terms and their retention policy. |
| The source code | Included with the licence: the full tree, yours to read, change and run on your own box, not to pass on. Cloud is that same tree, run for you. | Proprietary. Not provided, not modifiable. |
| If you stop paying | Cloud: the tracker, the conversions API and the dashboard stop once the paid period ends; store webhooks still record sales, and nothing is deleted. Licence: nothing changes — the instance keeps running and your history stays queryable; only new updates stop. | Access ends when the billing period does. |
| Getting it running | Cloud: an account and one line pasted into your site. Licence: install help included — a call working through DNS, TLS, the tracker and a first real conversion on your own site. | Paid professional onboarding pairs you with a specialist to wire the CRM and the ad platforms; they do not offer a free trial. |
| Sending the sale back | Server-side to Meta CAPI, Google Ads and TikTok Events, hashed, with one ledger row per send so a retry cannot double-count. | Server-side Conversion API to Meta, Google, LinkedIn, TikTok, Microsoft, Reddit and Snapchat. |
Cometly pricing read from www.cometly.com/pricing on 2026-10-05. Vendors change plans and prices; check the page before deciding on a number.
Choose on the shape, not the feature list.
Choose Cometly if
B2B SaaS teams that need attribution to reach closed-won revenue in the CRM, not just the order. That is a real advantage, and it is the reason these platforms exist.
Choose Open Attrib if
B2B teams that want the lead-to-revenue join in a database they can query — hosted at a flat price, or on a box they run. You get the same first-party tracking at one flat price whatever you spend — hosted on Cloud, or owned outright on your own server.
What Cometly does better than this.
A comparison that finds nothing in the other column is not a comparison. These are the published advantages of Cometly.
Full-funnel through to closed-won
B2B revenue arrives weeks after the click and lives in the CRM. Their account journeys follow a deal to closed-won, which is a different problem from attributing an order.
Warehouse and CRM sync
Live syncs and exports to Snowflake, BigQuery and Redshift, plus CRM sync, on the Enterprise tier. This product stores everything in its own Postgres and leaves getting it out to you.
An MCP server for agents
Attribution is queryable by an AI agent through their MCP interface.
No annual commitment, and breadth of send-back
Monthly billing on both tiers, and server-side conversion APIs to eight networks including LinkedIn, Microsoft, Reddit and Snapchat.
Cometly, answered.
Is Open Attrib a Cometly alternative?
Yes for a B2B team that will run its own instance, and no for one that needs a managed CRM-to-warehouse pipeline. Cometly follows a deal to closed-won in the CRM and syncs to your warehouse; Open Attrib records what it is told by API, webhook or tracker, and stores it in your Postgres.
Does Open Attrib attribute B2B deals to closed-won?
It can record one. A conversion arrives with a value, a currency and a CRM external id, so a closed-won event posted from your own system is attributed to the click that started it. It does not read your CRM itself, and there is no CRM sync.
How does the price compare with Cometly?
Cometly is priced by monthly pageviews and quoted on a call, with a 20% discount for paying annually. Open Attrib is one flat price whatever you spend — $499/mo on Cloud, or $997 once self-hosted — with no usage component at either price: pageviews, events and projects do not change the bill.
Can I self-host Cometly?
No. It is hosted, and their warehouse sync sends your data to infrastructure they operate. Open Attrib ships both ways: Docker Compose on your own box, the full source included with the licence, or Cloud hosted for you at the same flat price.
Compare it with the others, or with your own stack.
- Open Attrib vs Hyros — Managed attribution with a setup team, sold monthly on tracked revenue.
- Open Attrib vs Triple Whale — Shopify-native analytics and AI budget allocation; free tier, paid plans by quote.
- Open Attrib vs Northbeam — Enterprise multi-touch attribution with media mix modelling and incrementality.
- Open Attrib vs SegMetrics — Full-funnel analytics and lifetime value for info products, from $57 a month.
- Open Attrib vs Wicked Reports — Lifetime-value attribution for ecommerce and subscriptions, in revenue bands.
Something here wrong about Cometly, or out of date? [email protected] — corrections ship the same day.