PropLine

PropLine

5.0 out of 5 stars
PropLine Underdog

Related Products

  • Hotspot Shield
    4.2 out of 5 stars 121 Ratings
    Visit Website for Hotspot Shield
  • CoachIQ
    4.9 out of 5 stars 47 Ratings
    Visit Website for CoachIQ
  • Highcharts
    4.5 out of 5 stars 122 Ratings
    Visit Website for Highcharts
  • CredentialStream
    4.0 out of 5 stars 190 Ratings
    Visit Website for CredentialStream
  • Adzooma
    4.6 out of 5 stars 253 Ratings
    Visit Website for Adzooma
  • Rent Manager
    4.6 out of 5 stars 1,060 Ratings
    Visit Website for Rent Manager
  • RallyFuel
    5.0 out of 5 stars 1 Rating
    Visit Website for RallyFuel
  • CareLineLive
    4.7 out of 5 stars 182 Ratings
    Visit Website for CareLineLive
  • Kasm Workspaces
    4.8 out of 5 stars 127 Ratings
    Visit Website for Kasm Workspaces
  • Elecard Boro
    4.7 out of 5 stars 9 Ratings
    Visit Website for Elecard Boro
PropLine:

About

PropLine is a real-time sports betting odds API covering 110+ books and 70+ sports and leagues: US sportsbooks (DraftKings, FanDuel, BetMGM, Fanatics, Hard Rock, BetRivers), Pinnacle, DFS sites (PrizePicks, Underdog, Sleeper), prediction markets (Kalshi, Polymarket) and exchanges (Betfair, Smarkets, Novig, ProphetX). Every player prop is graded against the official box score: each Over/Under ships with won/lost/push/void plus the real stat. Five books stream in real time (about one second per line move). Pricing is per request, not per credit, and the response format is the-odds-api compatible, so switching is a base-URL change. Free tier: 1,000 requests/day, no card. Hobby $9/mo (5,000/day) unlocks every analytics feature: graded results, cross-book +EV, line history and opening/closing lines. Pro $19/mo (25,000/day) adds CSV exports; Streaming Lite $39/mo (250,000/day) and Streaming $79/mo (1M/day) add webhooks and a websocket. Python, Node, MCP and CLI SDKs.
Underdog:

About

Underdog Fantasy is a daily fantasy sports platform that allows users to participate in a variety of game formats, including Best Ball drafts, Daily Drafts, and Pick’em contests, all centered around predicting player performance in real-world sporting events. Unlike traditional fantasy leagues, many of its formats are streamlined for speed and simplicity; for example, Best Ball contests automatically select a user’s highest-scoring players each week without requiring lineup management after the draft. It emphasizes quick entry and engagement, enabling users to draft teams or make picks in minutes while competing for cash prizes based on statistical outcomes. In Pick’em contests, users select whether players will perform higher or lower than projected stats, combining multiple picks for increased payouts. Underdog is designed as a skill-based, peer-style experience rather than a traditional sportsbook, where outcomes depend on athlete performance.
PropLine:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Underdog:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported
PropLine:

Audience

Sports betting developers, quant/algo bettors, DFS tool builders, bet-tracker and odds-comparison apps, sports data engineers
Underdog:

Audience

Sports fans and fantasy players who want a fast, simplified way to predict player performance and compete in flexible, skill-based contests for real-money prizes
PropLine:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Underdog:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
PropLine:

API

Offers API Supported
Underdog:

API

Offers API Not Supported
PropLine:

Screenshots and Videos

Underdog:

Screenshots and Videos

PropLine:

Pricing

$0 (free tier) / $9 per month
Free Version Supported
Free Trial Not Supported
Underdog:

Pricing

Free
Free Version Supported
Free Trial Not Supported
PropLine:

Reviews/Ratings

Overall 5.0 / 5
ease 4.8 / 5
features 5.0 / 5
design 4.8 / 5
support 5.0 / 5
Underdog:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
PropLine:

Pros & Cons from Real Users

Pros

  • I love this company hands down, I have researched and tried many! The ODDS API is horrrrible compared to Propline for starters the credits are 10x more for API calls, the price and breadth of odds it just beats many and they keep adding improvements! Andy is awesome, truly! Email responsiveness has been the most trustworthy part. Not to mention that Andy has actively listened to my suggestions about the platform, tested the requests and some have been implemented if there was genuine value!!! I love Prop-line I truly do and its my best kept secret. A true gem that if you find them then you were supposed to ! Thank you for everything and I'm a proud member. I have tried parlayapi, theoddsapi, oddspapi is grossly expensive, man i can keep going on and on the rundown is restrictive and costs more for less calls per day I have reviewed the all Propline is the best one I have found!
  • Great collection of bookmakers (not just 20 copies 1xbet clones) , combining breadth and sharpness. Huge amount of features. Historical data available too, but I have not tried.
  • - Reliable - Easy to use - Plenty of data - Never run out of API calls especially with well priced webhooks - Most cost efficient product on the market and it's not even close
  • -Reliability is top notch quality -Accuracy is phenomenal -Data speeds are excellent - Support is available 24/7. They respond almost immediately if there is an issue.
  • PropLine has been one of the best APIs I’ve worked with. The API is fast, well documented, and easy to integrate, with excellent coverage across sports and player props. What really stands out is the support. The team listens to feedback, responds quickly, and has shipped multiple improvements based on real developer suggestions. The pricing is also very fair compared to other sports data providers.

Cons

  • None at all, anything I thought could benefit the platform Andy checked out and got to work on it immediately and any questions were answered within 24 hours.
  • I mean frankly, none. Any system like that occasionally has issues, and when I found something and emailed support the issue was fixed really fast, once literally within minutes.
  • Really can't think of much, maybe there could be a few more books but I know that is something Andy is consistently working on and I have no doubt those will come in the near future.
  • No cons found. I have been using on a daily basis since April 2026 and have zero complaints. If I had to "find" a con to list, it would be building out Prop-Line with the intent of Live Betting. During Live betting, Odds & Lines change frequently so it's a complete different beast.
  • I honestly don’t have any major complaints. I’d love to see the platform continue expanding with even more sports, markets, and documentation over time, but the team has been consistently improving the product and adding new features.
PropLine:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Underdog:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
PropLine:

Company Information

PropLine
Founded: 2026
United States
prop-line.com
Underdog:

Company Information

Underdog
United States
www.underdogfantasy.com
PropLine:

Alternatives

Underdog:

Alternatives

Kalshi

Kalshi

4.2 out of 5 stars
PropLine:
Sports Game Odds API

Sports Game Odds API

Sports Game Odds
Underdog:
PropLine:
Underdog:
PropLine:
Underdog:
PropLine:
Underdog:
PropLine:

Categories

Sports Data APIs Supported
Underdog:

Categories

Prediction Market Supported
PropLine:

Integrations

Kalshi Supported
Polymarket Supported
Underdog:

Integrations

Kalshi Not Supported
Polymarket Not Supported
PropLine:
Claim PropLine and update features and information
Claim PropLine and update features and information
Underdog:
Claim Underdog and update features and information
Claim Underdog and update features and information