For a Kalshi backtest, begin with the venue and the clock you need. For a Polymarket book-replay project, begin with whether you need each change or sampled states. These requirements matter more than a vendor's total row count.
This comparison checks public descriptions and the ZenHodl catalog on October 8, 2026. We did not purchase or inspect Telonex's historical payloads. Its advertised capture guarantees are vendor statements, not findings from our own validation.
What Telonex advertises
Telonex's homepage lists Polymarket, Polymarket Perps, Predict.fun and Binance Spot; Kalshi is absent from that list. It describes tick-level trades, book changes, quotes and on-chain fills delivered as daily Parquet files through an API or SDK.
Its listed prices are $99/month for Single Exchange, $199/month for Pro and custom Enterprise terms. The first two carry personal-use licenses; Enterprise advertises commercial use. Free market and tag files need no account. The separate five-file trial includes an API key and an account signup flow. Our earlier wording incorrectly applied the no-account claim to that trial.
These advertised channels make Telonex worth evaluating for change-by-change Polymarket history. Before relying on replay accuracy, inspect its timestamp definitions, snapshot initialization and gap handling for your chosen channel and dates.
What ZenHodl actually records
Our public catalog, vintage October 5, lists 27 active archive products priced from $9 to $199. Products overlap: a bundle and its component slices must not be added together as unique coverage.
| Research need | Relevant ZenHodl product | Recorded limits |
|---|---|---|
| Kalshi depth and captured prints | Kalshi Microstructure Tape | 821,979,759 depth rows and 29,984,492 deduplicated captured prints in the October 2 release; depth is sampled, up to 20 levels per side, selected by volume |
| Polymarket sports book states | Polymarket Sports Archive | 1,041,590,302 quote rows and 587,197,084 depth rows in the October 3 release; sampled states, not an event-replay log or executed-trade tape |
| Matched MLB quotes | MLB Cross-Venue Matched Book | 1,394,808 derived rows across 1,005 dated games; 965 settled and 40 unresolved; nearest-time joins can include a future quote within the stated ±30-second window |
The Kalshi depth table's observed bounds run from June 21 at 17:24:31.656958 UTC to October 2 at 23:59:16.002162 UTC. A global polling median does not promise that every ticker appears on every cycle. Trade creation time and retrieval time are separate; attached game context is not a verified exchange-event timeline. See the schema.
The Polymarket sports archive uses a roughly 30-second collection cycle. Some rows may reuse websocket state up to 300 seconds old without a per-row exact-age field. It cannot substitute for every historical book update. See the product documents.
Access and license decisions
A ZenHodl archive is a fixed downloadable release bought once, under the data license. Buying a ZIP does not transfer unrestricted ownership of the underlying data or include future releases. Our separate API plans also do not turn a historical archive into a continuously growing feed.
Compare the cost of the exact historical window, permitted use and update requirement. A subscription and a fixed archive solve different access needs; neither is automatically cheaper for every project.
Inspect before choosing
Use our free samples to check identifiers, quote fields and clock meanings before paying. For execution research, obtain evidence about queue position, fees and fills as well as quotes. Neither a sampled spread nor a vendor's data-volume headline establishes executable profit.
Sources: Telonex homepage and plan terms and ZenHodl public catalog, checked October 8, 2026. ZenHodl counts describe their named releases, not a complete season or exchange census.