Competitive landscape

Eight questions. We stand alone on three.

Compiled from every published taxonomy, pricing page and API document in this market. A dash means the vendor does not publish an answer — not that the product is worse. Three of the eight, nobody publishes at all.

Market structure

Four layers.
Nobody sells the fourth.

Most comparison questions are really a question about which layer you are shopping in. You can buy the first three from somebody. The fourth is the one that decides whether the other three were worth running.

Reference data

What is this company?

Dealroom PitchBook Crunchbase

Contact data

Who do I reach?

Apollo ZoomInfo Sales Navigator

Execution

How do I send it?

Clay Outreach HubSpot

Judgement

Which one deserves attention today?

Bounce Watch

Every layer above assumes somebody already decided which company deserved the work.

Source · 21 vendor sites reviewed · 10 Aug 2026

Question by question

Eight questions,
six answers each.

	Clay	Common Room	Specter	Harmonic	PredictLeads	Bounce Watch
Signal types published	custom	activity	~20	funding + team	29	40+
Change computed from its own record	Not published	Published	Published	Published	Not published	Yes
Refresh on demand, not on a cycle	Published	Not published	Not published	Not published	Not published	Yes
Metered by the call, not the seat	Published	Not published	Not published	Not published	Published	Yes
First-party MCP server for agents	Published	Not published	Not published	Not published	Published	Yes
Distinguishes 'no signal' from 'not yet checked'	Not published	Not published	Not published	Not published	Not published	Yes
Flags unconfirmed signals in the response	Not published	Not published	Not published	Not published	Not published	Yes
An agent can subscribe, not just poll	Not published	Not published	Not published	Not published	Not published	Yes

The marked rows are where we stand alone — and they answer a question this market has not been asked yet: what does your data say when it does not know?

Source · published vendor taxonomies, pricing pages and API documentation read 11–14 Aug 2026

Publishing changes. If a row is out of date on your product, tell us and we will correct it and re-date the table.

The three

What does your data say
when it does not know?

These three did not matter much while a person read every row. They matter enormously the moment software does.

'No signal' is not 'not checked'

An empty result usually reads as "nothing happened". Often it means "nobody looked". Every answer we return carries how recently we observed that specific company, so an absence can be trusted or discounted on purpose.

See the coverage block

A rumour is marked as a rumour

Some signals are confirmed by a filing or an announcement; some are reported and not yet confirmed. Both are useful. Silently mixing them is what turns a research tool into a liability.

See a rumour, marked

An agent can subscribe, not just poll

A server that only answers questions makes your agent ask again, and again, and pay each time. Ours can be told to watch a company and hand back what changed when it next runs.

See the MCP servers

One at a time

Already using one of these?

Most of these are not replaced by us — they answer a different layer's question. Each page says plainly where the other product is the better fit.

vs Apollo.io vs Crunchbase vs ZoomInfo vs PitchBook and Dealroom vs Clay vs Instantly vs Owler vs Grata vs Inven vs Harmonic vs Specter

Don't take the table's word for it.

Type a company you know. You will get its signals, and the date we last looked at it.

Check a company See the evidence page