Freedom251 › Conversion Rate Optimisation Tools
Otter
What Otter is
Otter is web-based A/B testing software that measures revenue per variant alongside conversion rate and average order value. Its visual editor supports unlimited variants and precise traffic splits without a developer handoff. Tests can target visitors by device, location, URL pattern or custom attributes, and existing Google Analytics 4 events can serve as conversion goals through a read-only connection. Manual-split tests offer frequentist or Bayesian reporting, while multi-armed bandits use Bayesian reporting automatically. Listed test types include split URL or redirect, A/B/n, content personalization and WordPress Theme Test. Supported stacks include Shopify, WordPress, Webflow, Wix, WooCommerce, ClickFunnels, Squarespace, Framer, Next.js, Google Tag Manager and custom JavaScript. Otter also provides a REST API and MCP server. Its JavaScript SDK is under 9KB and loads asynchronously. Pricing starts at 49 /mo with a 14-day trial; there is no free plan.
Who it suits
Otter suits individuals, growing teams, businesses, large teams and agencies running web experiments. It fits buyers needing visual editing, targeting, revenue tracking and server-side testing.
What it does well
- Measures revenue per variant
- Unlimited variants in visual editor
- Audience targeting by several attributes
- Bayesian and frequentist reporting
- REST API and MCP server
What to know first
- No free plan
- Paid pricing starts at 49 /mo
- Feature flags are not included
- Listed platform is web
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Scale | $189$149/per month · Unlimited projects · Unlimited A/B tests · Unlimited visitors · Revenue tracking · Decision-ready reporting · Zero-flicker SDK · Priority support | $149 a month |
| Starter | $49$39/per month · 1 project · Unlimited A/B tests · Unlimited visitors · Revenue tracking · Decision-ready reporting · Zero-flicker SDK · Email support | $39 a month |
| Growth | $99$79/per month · 5 projects · Unlimited A/B tests · Unlimited visitors · Revenue tracking · Decision-ready reporting · Zero-flicker SDK · Email support | $79 a month |
As otterab.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
Otter brings visual, redirect, personalization and server-side experimentation into one web product. Its paid plans and absent feature flags are important considerations for prospective buyers.
Facts from Otter's own pages
- Analytics
- Otter can use existing Google Analytics 4 events as conversion goals through a read-only connection. · otterab.com, 11 Oct 2026
- API and AI
- Otter provides a REST API and an MCP server for managing experiments from an editor or AI assistant. · otterab.com, 11 Oct 2026
- Company
- Otter says it was built after its team ran A/B tests across e-commerce, SaaS, and content sites, and describes itself as a small team. · otterab.com, 11 Oct 2026
- Integrations
- Otter lists Shopify, WordPress, Webflow, Wix, WooCommerce, ClickFunnels, Squarespace, Framer, Next.js, Google Tag Manager, and custom JavaScript as supported stacks. · otterab.com, 11 Oct 2026
- Intended users
- The pricing page describes Starter for individuals and side projects, Growth for growing teams and businesses, and Scale for large teams and agencies. · otterab.com, 11 Oct 2026
- Performance
- The product page says its JavaScript SDK is under 9KB, loads asynchronously, and runs no code on pages without a targeted test. · otterab.com, 11 Oct 2026
- Privacy
- The privacy policy says Otter does not sell visitor data, share it between customer accounts, or use it for advertising or profiling. · otterab.com, 11 Oct 2026
- Product
- Otter is A/B testing software that measures revenue per variant alongside conversion rate and average order value. · otterab.com, 11 Oct 2026
- Security
- Otter says data is encrypted in transit using TLS/HTTPS and at rest, and account passwords are hashed using bcrypt. · otterab.com, 11 Oct 2026
- Statistics
- Manual-split tests can use frequentist or Bayesian reporting, while multi-armed bandits use Bayesian reporting automatically. · otterab.com, 11 Oct 2026
- Support
- Otter offers email support, a site and dashboard live-chat widget, and a priority-support plan tier. · otterab.com, 11 Oct 2026
- Targeting
- Tests can target visitors by device, location, URL pattern, or custom attributes. · otterab.com, 11 Oct 2026
- Visitor tracking
- The privacy policy says the SDK computes a device fingerprint stored as device metadata, but does not use it to merge visitor records or identify visitors across customers' websites. · otterab.com, 11 Oct 2026
- Visual testing
- Its visual editor supports unlimited variants and precise traffic splits without a developer handoff. · otterab.com, 11 Oct 2026
Where Otter stands on Freedom251
- Conversion Rate Optimisation Tools#16 of 22
- A/B Testing Tools#44 of 52