Everything you need to ship
better experiments
Guides, references, and worked examples for installing Otter, building tests, reading results, and integrating from your stack.
Getting Started
Get set up: install Otter, invite your team, secure your account, and manage billing.
Quick Start
Drop the Otter snippet into your site and start running tests.
Integration Guides
Platform-specific install guides for Shopify, WordPress, and more.
Project Settings
Edit each project's name, URL, setup guide, timezone, and analytics forwarding from a single page.
Members & Roles
Invite teammates with one of four roles (owner, admin, member, viewer). Each role controls a precise set of capabilities.
Signing In & Account Security
Sign in with a password or a passkey, add passkeys for safer logins, and reset a forgotten password.
Billing & Plans
Three plans (Starter, Growth, Scale), 14-day free trial, monthly or annual billing.
Excluded IPs
Keep your team's traffic out of test results. Account-wide list of exact IPv4 or IPv6 addresses to mark as bot traffic.
Branding
Set a company name, logo, and primary/secondary colors. Customization appears on public shared-report links.
Free Tools
A free set of calculators, generators, and guides for planning and checking tests — no account required.
Building Tests
Design experiments — pick a test type, choose pages, and define goals.
Creating a Test
Test types, the six-step wizard, and how variants are configured.
URL Matching
Choose which pages each test runs on — exact, simple, contains, wildcard, regex.
Visual Editor
Build variants by editing your live site in a popup window. Apply changes to one element or all matching instances. 15-minute signed sessions, scoped to your verified project's domain.
Preview Bar
A bottom toolbar that lets you view your live site as any test → variant — drafts included — without touching results.
Goals
Pageview, click, custom event, revenue, and GA4 goal types.
Revenue & Currency
Track money made by each version and report it in a single currency — Otter converts other currencies for you so the comparison is fair.
GA4 Integration
Connect a GA4 property so you can use existing GA4 events as goals. OAuth flow, property selection, sync schedule, and limits.
Targeting
Filter who sees a test with AND/OR rules over 18 fields: location, device, traffic source, UTM tags, time, cookies, custom properties.
Test Lifecycle
Draft, running, paused, completed, archived — what each state means, which transitions are allowed, and when you can edit, delete, duplicate, or restore.
Stop Conditions
Configure a test to auto-complete when it hits a visitor count, conversion count, or when a variant wins. Hands-off lifecycle management.
Scheduled Start & End
Auto-launch a draft at a future time. Auto-complete a running test at a future time. Both checked every 5 minutes; auto-start requires the test to be launch-ready.
Version History
Every meaningful draft edit creates a snapshot with an auto-generated summary. Restore any prior version into the current draft.
Custom CSS & JavaScript
Drop bespoke CSS and JS into a test or variant when the visual editor isn't enough. Variant-scoped runs only for that variant; test-wide runs for everyone in the test (including the control).
Analyzing Results
Read the results page with confidence and understand the math behind it.
Reading Results
Frequentist and Bayesian analysis, confidence thresholds, and key fields.
Executive Summary
A plain-English card at the top of every results page that tells you, in one line, whether to ship the change, keep testing, or stop — and why.
Experiment Health
An automatic checklist on every results page that tells you whether your numbers are safe to trust yet, and what to fix if they aren't.
Segments & Breakdowns
Slice your results down to a group of visitors — like mobile users or email traffic — to spot patterns. Powerful, with one important rule to use them honestly.
Comments
Per-test discussion threads. Live updates, every role can post (including viewers), and authors can delete their own comments.
Activity Log
Auto-recorded per-test history: lifecycle events, edits, restores, scheduled starts/ends, and stop-condition trips. Live-updates and shows who did what.
Chart Annotations
Pin dated notes to the results chart — like a deploy or a campaign — so you (and anyone you share with) understand the bumps and dips later.
Shared Reports
Public, read-only links to a test's results page. Optional password, optional expiry, revokable any time.
Exporting & Emailing Reports
Download your results as a spreadsheet (CSV) or a PDF, and have a report emailed to anyone on a daily or weekly schedule.
Concepts
Variant assignment, statistical significance, and the anti-flicker snippet.
Developer Reference
SDK methods, REST endpoints, and QA tooling for engineers.
SDK API Reference
Methods on the global optimo object — track, identify, get variants, consent.
API Keys
Account-scoped bearer tokens for the REST API and MCP server. Pick scopes, restrict to specific projects, revoke when no longer needed.
REST API
HTTP endpoints for server-side integrations.
Notifications & Webhooks
Send test events to Slack or your own webhook, and schedule a daily digest. Five event types, idempotent delivery, signed payloads.
Preview Mode
Force a specific variant for QA and stakeholder review.
URL Parameters
Debug, verify, opt out, and refresh the SDK with query strings.