Add On IDX vs SimplyRETS

Add On IDX embeds MLS property search widgets into virtually any website—Webflow, WordPress, Squarespace, Wix, and more—covering 450+ boards across the U.S. and Canada, with no long-term contracts.

$149/mo

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SimplyRETS

SimplyRETS is an MLS data API and IDX platform built for developers — turn any website into a property search tool with clean JSON endpoints and an official WordPress plugin.

$49/mo

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Add On IDX vs SimplyRETS: feature comparison

Feature	Add On IDX	SimplyRETS
Custom CSS / Design Control	✓	✓
Lead Capture Forms	✓	✓
Map-Based Search	✓	✓
Market Report Widgets	✓	✗
Multi-MLS Coverage	✓	✓
Saved Search / Client Alerts	✓	✓
Standalone Hosted Pages	✗	✗
WordPress Plugin	✗	✓

Add On IDX — Pros & Cons

Pros

Supports virtually any website platform via JavaScript embed—not just WordPress
Covers 450+ MLS boards across the U.S. and Canada
Month-to-month billing with no long-term contracts
Webflow Premium Partner with native integration for modern no-code builds

Cons

MLS paperwork approval delays account activation by 1–7 business days
No demo environment available due to MLS data regulations—buyers must commit before testing
No standalone hosted IDX website; requires an existing website or builder
Higher starting price ($149/mo) than IDX Broker ($55/mo) or Showcase IDX ($59.95/mo)

SimplyRETS — Pros & Cons

Pros

Clean RESTful JSON API with code examples in cURL, Python, PHP, and Node.js — the most developer-friendly MLS data option in the category
Transparent flat-rate pricing ($49–$199/mo) with no long-term contracts or per-seat fees
Multi-MLS add-on lets a single account pull data from multiple markets without separate IDX agreements per region
30-minute listing refresh keeps data current, and sold/closed data is available for market analysis add-ons

Cons

No built-in website, CRM, or admin dashboard — requires a separate tech stack and developer effort before any agent can use it
MLS coverage is not universal; agents in smaller or non-participating markets may find their MLS unsupported
Support is documentation and email only — no phone or live chat when a data feed goes down during a critical client demo
The $99 one-time connection fee per MLS feed compounds quickly for multi-market teams or those switching markets

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