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Sales Enablement · head to head

Cognism vs Common Room

Cognism logo

Cognism

Sales Enablement

B2B contact data that notifies European contacts and screens do-not-call lists as a product feature

From
On request
Rated
-
Full reviewWebsite
Common Room logo

Common Room

Sales Enablement

Customer and community intelligence that stitches scattered person identities into one go-to-market signal feed

From
$2500/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cognism united States coverage is behind ZoomInfo, and the gap shows most in mid-market American accounts where record density thins out.; Common Room the entry plan is 2,500 US dollars a month billed annually, a floor of 30,000 a year, which excludes exactly the early-stage community-led companies whose signal is strongest.
  • They diverge on capability: Cognism covers Diamond Data, Common Room covers Person360 identity resolution.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cognism and Common Room actually diverge.

Attributes where Cognism and Common Room differ
AttributeCognismCommon Room
Starting priceOn request$2500/month
Pricing modelquotePer month by contact volume
PlatformsWeb, Chrome extension, REST APIWeb, Chrome extension

Identical on both: free tier (No), user rating (Not yet rated), category (Sales Enablement).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Cognism

  • Diamond Data
  • Contact notification
  • DNC screening
  • Browser extension
  • CRM enrichment

Only in Common Room

  • Person360 identity resolution
  • Community source ingestion
  • Signal alerts
  • Account and contact scoring
  • Website deanonymisation
  • RoomieAI research
  • Prospector
  • MCP server

Both cover

  • Intent data

What people use each for

The jobs each tool is most often brought in to do.

Cognism

  • A European outbound team that needs a defensible answer when legal asks where the phone numbers came fromnot Common Room
  • Calling campaigns where verified mobile numbers rather than switchboard numbers determine connect ratenot Common Room
  • Enriching an existing CRM of stale records with current job titles and direct dialsnot Common Room
  • Prioritising accounts using intent signals before committing sales development capacitynot Common Room

Common Room

  • A developer tools company whose GitHub stars and Slack community contain buyers nobody has ever contacted because the handles do not match any CRM recordnot Cognism
  • A sales team that wants to be alerted when a former champion changes job to a target account, with the previous relationship attachednot Cognism
  • A marketing function trying to prove that community participation precedes pipeline, which requires joining community identity to opportunity datanot Cognism
  • A product-led business wanting to route free users who match the enterprise buyer profile to sellers based on both product usage and public activitynot Cognism

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Cognism

  • United States coverage is behind ZoomInfo, and the gap shows most in mid-market American accounts where record density thins out.
  • The commercial model combines an annual platform fee, per-seat licences and credit allowances, so a quoted seat price consistently understates the total.
  • Diamond Data verified mobiles are a subset of the wider database rather than the whole of it, and the subset available for your target market should be tested before signing.
  • There is no free tier and no monthly rolling contract, so evaluating properly means committing to a year or relying on a short trial with limited data.
  • Coverage density varies sharply by country, with the United Kingdom strong and DACH and the Nordics noticeably thinner, which matters if your expansion market is the weak one.

Common Room

  • The entry plan is 2,500 US dollars a month billed annually, a floor of 30,000 a year, which excludes exactly the early-stage community-led companies whose signal is strongest.
  • RoomieAI and Prospector run on credit allocations rather than unlimited use, so heavy research months exhaust the budget and the workflow stops until the next cycle or an upgrade.
  • Contact ceilings of 100,000 on Essential are consumed quickly by any sizeable public community, and the overage conversation is an upgrade to a quoted tier rather than an incremental charge.
  • Identity resolution is probabilistic, so wrong merges happen, and a seller who contacts the wrong person with context from someone else does more damage than no alert at all.
  • Signal volume overwhelms teams without a defined qualification rule; most implementations that fail do so because everything became an alert and sellers stopped reading them within a month.

Pricing, plan by plan

Cognism

On request
  • Cognism Platform$undefined/year
    • Annual platform fee plus per-seat licences
    • Credit allowances for exports and enrichment negotiated separately
    • No free tier and no monthly rolling term

Common Room

$2500/month
  • Essential$2500/month
    • 5 seats
    • 100,000 contacts
    • Person360 enrichment and identity resolution
  • Advanced$undefined/year
    • 15 seats
    • 250,000 contacts
    • RoomieAI research, 7,500 credits
  • Enterprise$undefined/year
    • 30 seats
    • 750,000 contacts
    • RoomieAI research, 10,000 credits

Which should you pick?

Choose Cognism if

  • You need diamond data.
  • You work on Web, Chrome extension, REST API.
  • You also want contact notification.
Cognism review

Choose Common Room if

  • You need person360 identity resolution.
  • You work on Web, Chrome extension.
  • You also want community source ingestion.
Common Room review

Questions people ask

Is Cognism or Common Room better?
Neither clearly leads. Cognism starts at On request and Common Room at $2500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cognism or Common Room?
Cognism starts at On request and Common Room at $2500/month.
Does Cognism or Common Room run on more platforms?
Cognism runs on Web, Chrome extension, REST API. Common Room runs on Web, Chrome extension.
What is Cognism best used for?
Cognism is most often used for a european outbound team that needs a defensible answer when legal asks where the phone numbers came from, calling campaigns where verified mobile numbers rather than switchboard numbers determine connect rate, enriching an existing crm of stale records with current job titles and direct dials, prioritising accounts using intent signals before committing sales development capacity. Of those, a european outbound team that needs a defensible answer when legal asks where the phone numbers came from and calling campaigns where verified mobile numbers rather than switchboard numbers determine connect rate are not what Common Room is typically brought in for.
What can Cognism do that Common Room cannot?
Cognism covers Diamond Data, Contact notification, DNC screening, Browser extension. Common Room covers Person360 identity resolution, Community source ingestion, Signal alerts, Account and contact scoring. Both handle Intent data.

Answered from the vendors’ own pages

Cognism: Can a European company use it lawfully?

It notifies contacts held in its EU and UK database and screens do-not-call registers, which supports a legitimate interest basis. The balancing test, record keeping and handling of objections remain your obligation, not the obligation of the vendor.

Common Room: What does the entry plan actually cost?

2,500 US dollars per month billed annually, for 5 seats and 100,000 contacts. Higher tiers are quoted.

Cognism: How does it compare with ZoomInfo on coverage?

ZoomInfo is stronger in the United States, Cognism is generally stronger on European mobile numbers. That, rather than feature lists, is what most head-to-head evaluations come down to.

Common Room: Is this only for developer tools companies?

It is strongest where there is a public community to observe. Companies with no community signal get a narrower version of the product and should compare it against ordinary intent data vendors.

Cognism: Can we buy a single seat monthly?

No. Contracts are annual with a platform fee, which makes a genuine pilot harder than with credit-based self-serve vendors.

Common Room: Does it replace ZoomInfo?

No. It is signal and identity resolution rather than a contact database, though Prospector covers some contact discovery within accounts.

Common Room: How are AI features metered?

By credits per tier, from 5,000 RoomieAI credits on Essential up to 10,000 on Enterprise, with Prospector credits counted separately.

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