Promptwatch vs Otterly.AI vs Gauge: Which AI Visibility Tracker Wins in 2026?
A three-way breakdown of Promptwatch, Otterly.AI, and Gauge on engine coverage, pricing, evidence quality, and who each platform actually fits in 2026.
Promptwatch, Otterly.AI, and Gauge keep showing up in the same shortlist because they're all answering the same question, how does a brand actually appear across ChatGPT, Perplexity, Gemini, and the rest of the AI answer engines, but they answer it in genuinely different ways and at genuinely different prices. The price spread alone is worth noting before you read the feature lists: Otterly.AI starts at $29/mo, Promptwatch's paid plans start at $95/mo (with a free tier below that), and Gauge starts at $599/mo, none of which tells the whole story once you configure real coverage.
Promptwatch is the broadest platform of the three, with prompt tracking, citation analytics, visitor analytics, and automated content generation in Essential. AI crawler logs begin on Professional or an agency plan. Otterly.AI is the cheaper first tool for proving the category, as long as you read past the sticker before scaling. Gauge is the raw-volume value play, but the vendor has a thinner review record.
Promptwatch vs Otterly.AI vs Gauge at a glance
| Promptwatch | Otterly.AI | Gauge | |
|---|---|---|---|
| Starting price | Free tier; $95/mo Essential | $29/mo | $599/mo |
| Category | AI visibility tracker | AI visibility tracker | AI visibility tracker |
| Engine coverage | ChatGPT, Gemini, Claude, Perplexity, Grok, Llama, DeepSeek, Mistral, Copilot, plus AI Overviews and AI Mode; daily refresh on paid plans | 4 base engines (ChatGPT, AI Overviews, Perplexity, Copilot); Gemini/Claude/AI Mode cost extra | 6 engines, 600 prompts run daily (~108,000 answers/mo), the highest volume in this list |
| Evidence / trust signal | 4.7/5 on G2 across 1,840+ brand and agency customers; €2M+ ARR within 12 months of launch | Gartner Cool Vendor 2025, but users report data lagging up to 7 days | Visibility scored against Gauge-generated synthetic prompts, not logged user queries |
| Action layer | Content Agents plan, write, and publish GEO content directly to a connected CMS (Webflow, Framer) | None, monitoring plus a GEO audit grading 25+ on-page factors, no execution | Built-in content engine ships 18 publish-ready articles/mo plus nightly content-health audits |
| Best for | a team that wants tracking, citations, and content in one platform, with Professional used when crawler logs are required | an SMB or first-time GEO buyer that wants the cheapest credible entry point and can live with weekly-ish data | a team that wants maximum daily answer volume plus content production in one tool, and accepts the vendor risk |
Where Promptwatch wins
Promptwatch's case rests on breadth rather than the lowest sticker price. Essential is $95/mo and covers ChatGPT, Gemini, Claude, Perplexity, Grok, Llama, DeepSeek, Mistral, Copilot, Google AI Overviews, and AI Mode. It also includes citation analytics, 200K visitor events, and five AEO articles. Professional is $245/mo and adds 25M crawler logs. Explore is free for 10 ChatGPT prompts. Founded in Amsterdam in April 2025, Promptwatch grew to €2M+ ARR within its first 12 months, raised a €6M seed round in July 2026, and holds a 4.7/5 average on G2 across 1,840+ brand and agency customers. Otterly.AI has the cheaper entry tier, while Essential's caps of 50 prompts and 6,000 responses may push active teams to Professional.
Where Otterly.AI wins
Otterly.AI's case rests on the fastest, cheapest on-ramp into GEO, a genuine no-card free trial, a working dashboard inside an hour, and a $29/mo entry point nothing else in this list undercuts. A Gartner Cool Vendor pick (2025) with a large SMB user base, though no G2 score is on record in our data. The trade-off: the advertised engine list is really 4 base engines (Gemini, Claude, and AI Mode are paid add-ons), and monitoring data can lag up to 7 days.
Where Gauge wins
Gauge's case rests on unmatched raw volume, 600 prompts run daily across six engines, roughly 108,000 answers a month, plus a content engine that ships 18 articles a month in the same subscription. Zero reviews on G2, Capterra, TrustRadius, or Trustpilot, and only about $500K raised (YC S24) versus rivals' eight-figure war chests. The trade-off: there are zero third-party reviews anywhere, the $99 starter tier was quietly removed mid-2026, and the company has raised a fraction of what its rivals have.
Action layer: who does something with the data?
Promptwatch and Gauge both act on the data now, just differently: Promptwatch's Content Agents plan, write, and publish GEO content directly to a connected CMS (Webflow, Framer), while Gauge ships 18 publish-ready articles/mo plus nightly content-health audits. Otterly.AI stays deliberately monitoring-only. If someone on your team is ready to act on findings without a separate tool, weight that over raw tracking depth.
Pricing: sticker price vs configured price
Sticker prices rarely survive contact with a real configuration. Promptwatch: Free Explore (10 prompts, ChatGPT only), $95/mo Essential (50 prompts, 6,000 responses, 5 AEO articles/mo), $245/mo Professional (150 prompts, 1M visitor events, 15 AEO articles/mo), $579/mo Business (350 prompts, 10M visitor events, 30 AEO articles/mo); annual billing gets 12 months for the price of 10. Otterly.AI: $29/mo Lite (15 prompts, 4 base engines), $189/mo Standard (100 prompts, API), $489/mo Premium (400 prompts); Gemini, Claude, and AI Mode are $9 to $149/mo add-ons. Gauge: 1-week free trial, then $599/mo Growth (600 prompts/day across 6 engines, 18 articles/mo); Enterprise custom for Claude, Grok, and API. Price your actual engine list, prompt volume, and seat count against each of these before treating any single number as the real cost of ownership.
Who should pick which
- Pick Promptwatch if you're a team that wants one platform covering prompt tracking, citation analytics, crawler logs, and content generation, without enterprise pricing.
- Pick Otterly.AI if you're an SMB or first-time GEO buyer that wants the cheapest credible entry point and can live with weekly-ish data.
- Pick Gauge if you're a team that wants maximum daily answer volume plus content production in one tool, and accepts the vendor risk.
FAQ
Which of the three is cheapest for a small team?
Otterly.AI has the lowest entry price at $29/mo. Promptwatch's Essential plan starts at $95/mo, with a free 10-prompt Explore tier below it, and still undercuts Gauge's $599/mo by a wide margin. Essential adds citation analytics, visitor analytics, and five AEO articles to the broader engine set. Crawler logs begin on Professional at $245/mo.
Which one has the most trustworthy data?
Promptwatch has the strongest independent review signal of the three: a 4.7/5 average on G2 across 1,840+ brand and agency customers, plus €2M+ ARR within its first 12 months and a €6M seed round in July 2026. Otterly.AI: A Gartner Cool Vendor pick (2025) with a large SMB user base, though no G2 score is on record in our data. Gauge: Zero reviews on G2, Capterra, TrustRadius, or Trustpilot, and only about $500K raised (YC S24) versus rivals' eight-figure war chests. Treat every AI-tracking vendor's accuracy claims as directional rather than exact, and cross-check a sample of results manually before reporting them upward.
Do any of these three help me fix visibility gaps, or just report them?
Promptwatch (via Content Agents that plan, write, and publish GEO content to a connected CMS) and Gauge (via a content engine that ships 18 articles/mo plus nightly content-health audits) both do; Otterly.AI doesn't, it's deliberately monitoring-only.
How does Promptwatch's pricing actually compare once the others are configured?
Promptwatch's $95/mo Essential plan covers every supported engine, 50 prompts, 6,000 responses, citation analytics, 200K visitor events, and five AEO articles. Professional at $245/mo is the first brand plan with crawler logs and includes a 25M allowance. Otterly.AI starts at $29/mo and typically costs more once you match its real coverage to yours. Gauge starts at $599/mo and also costs more once you match its real coverage to yours. Promptwatch's published tiers are the useful anchor for this comparison.
Do I need all three, or should I pick one?
Running two overlapping trackers rarely earns its keep, pick the one whose category (tracking-only, action-oriented, or research-grade) matches how your team actually works, and revisit the others only if that gap becomes obvious. See how we rank for the criteria we weigh across every platform in this category.