Best free
arBtrage
Free account, no card, and no paid plan listed. Unlocks an unusual options activity feed, an earnings calendar with expected moves, congressional trades and a screener.
Options flow tools compared: prices, free plans and trials
Every unusual options flow and dark pool tool we list, side by side: what it costs month to month and billed yearly, what the free plan actually shows, and how the trial works. Prices come from each tool's own site; the last column shows when we last checked it.
Quick picks
Best all-round
Unusual Whales
Retail Basic is $50/mo, or $42/mo billed annually ($504/yr) with a 7-day free trial. Real-time flow, dark pool and congressional trades. The free account shows flow 2 trading days late.
Best for flow + dark pool
Cheddar Flow
Standard is $85/mo after a 7-day free trial; Pro is $99/mo, or $75/mo on the annual plan. Real-time order flow, dark pool prints and a GEX radar. No free plan.
Best for 0DTE flow
Reslyce
$29/mo after a 21-day free trial, no card. Its Flow Matrix shows 0-2 DTE activity by ticker and minute. Index options such as SPX are not covered.
Quick-pick facts re-checked on each vendor's own page on 2026-11-10.
| Tool | Starting price | Month-to-month | Billed yearly (total) | Free plan | Trial | Our note | Checked |
|---|---|---|---|---|---|---|---|
| arBtrage | Free | Free | Free | Yes: Free account unlocks calendar, dashboards, heatmaps, flow, congressional trades and screener; no card. | Not applicable (free). | Completely free: unusual options activity, expected moves and congressional trades. No paid plan listed. | 2026-11-01 |
| PredixLab | From $16/mo | $20 | $192 | Yes: Free account sees the options activity list and Gamma Map with a 10-calendar-day delay. | No trial listed on the pricing page; free delayed account. | Once-a-day unusual activity on S&P 500 and Nasdaq-100 stocks from end-of-day open interest, not intraday. Free account is 10 days behind. | 2026-11-02 |
| Reslyce | From $29/mo | $29 | Not verified | Yes: A recorded session can be explored free with no account. | 21 days free, no card required. | Built for 0-2 DTE flow minute by minute. Doesn't cover index options such as SPX. | 2026-11-09 |
| OptionStrat | From $39.99/mo | $39.99 | Not verified | Yes: Free plan with delayed data and limited access to each feature. | 7-day trial on paid plans. | A strategy builder first. The flow feed needs the Live Flow plan ($99.99/mo), not the $39.99 Live Tools plan. | 2026-11-09 |
| Unusual Whales | From $42/mo | $50 | $504 | Yes: Free account sees the whole platform with flow delayed 2 trading days, news 15 min and alerts 30 min. | 7-day free trial for new subscribers on annual Retail Basic and Retail Pro plans; API plans also list a 7-day free trial. | The widest data set here: flow, dark pool, GEX and congressional trades. Free account runs 2 trading days behind. | 2026-11-03 |
| InsiderFinance | From $55/mo | $75 | $660 | Yes: Free options flow page. | Not verified | Has a free options flow page to try first. Paid plans are $75 monthly or $660 a year. | 2026-11-09 |
| BlackBoxStocks | From $59/mo | $59 | Not verified | Not verified | Not verified | Flow sold with live trading rooms and a community. We couldn't confirm a free plan or trial. | 2026-11-09 |
| Quant Data | From $62.50/mo | $74.99 | Not listed | No | 7-day free trial. | Flow plus dealer-exposure heat maps and dark pool prints. No free plan; 7-day trial. | 2026-11-09 |
| Tradytics | From $69/mo | $69 | Not listed | Yes: Free basic access: market overview, daily scanner, free Discord channels. | $15 for first 15 days. | AI summaries of flow and Discord bots. Last confirmed Oct 26; its site returned an error when we re-checked on Nov 9. | 2026-10-26 |
| Cheddar Flow | From $75/mo | $85 | Not listed | No | 7-day free trial (Standard). | Clean flow feed with real-time dark pool data and a GEX radar. No free plan; the trial is on Standard only. | 2026-11-09 |
| Unusual Whales API | From $99/mo | $99 | Not verified | No | 7-day free trial for new API subscribers on Options Starter and Basic. | For developers: flow over REST, WebSocket, Kafka and MCP. A separate subscription from the dashboard plans. | 2026-11-09 |
| FlowAlgo | Sign-ups paused | Not listed | Not listed | No | No trials while sign-ups are paused (until Q1 2027). | Offline since Oct 30, 2026. New sign-ups reopen in Q1 2027, with new pricing to be announced. | 2026-11-09 |
Starting price is the lowest advertised per-month cost, often the annual-billing rate. Check the month-to-month column if you don't want to commit for a year.
Quick answers
- Completely free: arBtrage.
- Paid tools with a free plan: PredixLab, Reslyce, OptionStrat, Unusual Whales, InsiderFinance, Tradytics.
- No free plan: Quant Data, Cheddar Flow, Unusual Whales API, FlowAlgo.
- Lowest starting price: PredixLab at $16/mo.
Related
- All options flow trackers
- FlowAlgo alternatives
- Unusual Whales alternatives
- Cheddar Flow alternatives
- Barchart alternatives (Premier includes unusual options activity)
- Options data APIs compared
How we check
We take prices, free plans and trials from each tool's live site, and anything we couldn't confirm says Not verified. Listings are not ranked by payment. Spot a change? Tell us.