72%
of rounds reach the API within an hour of publication
Measured from the article's publish timestamp across 2,000+ served rounds, recomputed weekly.
Datahyena vs. Harmonic
Finding companies early, or knowing the instant one moves.
Harmonic is a discovery product: search a universe of startups and founders, build lists, watch them develop. Datahyena is a detection product: an event happened, here it is, in your system within the hour. Sourcing and monitoring are related jobs, but they are not the same one.
In short
Harmonic's strength is finding things before they are obvious — deep startup and founder profiles, people data, list-building for a sourcing team working inside a tool. Ours is the moment of the event itself: funding, acquisitions and executive moves, deduplicated across every outlet that covered them, delivered by webhook within about half an hour of publication. A sourcing team often wants both; a product that reacts to funding usually only wants the second.
Measured, not asserted.
Recomputed weekly from the live corpus. Every figure below is reproducible from your own API responses.
55%
of rounds are reported by exactly one publication
The rounds that never reach a well-known outlet are exactly the ones a sourcing edge depends on seeing.
36 minutes
median publication to API
84% are through inside two hours.
250+
rounds announced in the last seven days
A live figure, not a historical average.
As of September 7, 2026
Side by side.
Datahyena
Harmonic
The job it does
Detects events as they are published
Discovers companies and people
Pre-funding companies
Only once an event exists
A core strength
People and founder depth
Executives attached to moves we detect
Deep people data
Detection latency
Published: 71% within 1h, median 36 min
Not published as a metric
Primary interface
API, webhooks, MCP
Web app plus API
Per-company history
Timeline: funding, acquisitions, exec moves
Company and founder profiles
Investor graph
49,000+ investors, 190,000+ round links
Investor and portfolio views
Pricing
Usage credits from free
Platform tiers
Which one fits you.
Choose Datahyena when
- You want to be told, not to go looking. Webhooks fire on new and updated events with nothing to poll.
- The trigger is what matters: a round closed, a CEO changed, a company was acquired.
- Your consumer is a system — a CRM, a scoring model, an agent — rather than a person browsing.
- You want the long tail. Six rounds in ten never reach the outlets a person would think to watch.
When Harmonic is the better choice
- You are sourcing: finding companies before they have raised, which is precisely when we have nothing to say about them.
- You need depth on founders and people, including who worked where and when.
- Your team works inside a product, building and refining lists rather than consuming an API.
- You want signals we do not carry, such as headcount growth or web traffic movement.
What makes Datahyena different.
Detection, not discovery
We make no claim to help you find a company before it has done anything. What we do is notice the moment it does, across every outlet that reported it, and put that in your system while it still changes what you would do next.
The long tail is where the edge is
Six in ten rounds we track appear in a single publication. If your sourcing advantage comes from seeing what others miss, the constraint is how many sources are being read, not how good the interface is.
Executive moves as a first-class event
A new CRO or CTO is a buying signal and a sourcing signal, and it sits on the same company timeline as the funding. Most tools in this space treat leadership change as a profile field rather than an event with a date you can trigger on.
Where Harmonic wins.
A comparison with no losses is an advert. These are the cases where we would tell you to buy the other thing.
We cannot help you find a company before its first event
A company enters our corpus when something happens to it. Pre-seed, pre-announcement, still-in-stealth discovery is the job Harmonic is built for and we are structurally unable to do it.
People data is shallow by comparison
We hold executives attached to moves we detected, and founder flags on companies. What we do not have is a searchable graph of who worked where over time.
No browsing UI
There is a dashboard with a query playground, but no list-building workspace. If your team's daily work is refining lists by hand, that is a real difference in the shape of the tool.
Common questions
Datahyena and Harmonic, answered.
Can I use this for sourcing?
For event-driven sourcing, yes: a round just closed in your thesis area, in a country you cover, at a stage you invest at, and you hear within the hour. For pre-event sourcing — finding a company before anyone has written about it — no, and Harmonic is a better fit.
Do you cover executive moves?
Yes, as a first-class event type on the same company timeline as funding and acquisitions, with the person resolved. A leadership change is often the earlier signal.
How current is 'current'?
71% of rounds are queryable within an hour of the article being published, and the median is 36 minutes. Webhooks fire as events land, so nothing has to poll.
Do teams use both?
Commonly. Harmonic to build and refine the universe you care about, a watchlist here to be told the moment anything in it moves.
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