Otterly.AI vs Sellm (2026): which should you pick?

Pick Otterly.AI if

• Fits if a daily read on ChatGPT, Perplexity, AI Overviews and Copilot is what you need
• Works for agencies that brand client reports through Looker Studio, from Standard

Look elsewhere if

• Skip it if Gemini, AI Mode or Claude matter to you, as they're paid add-ons on every plan, and all seven engines add $227 a month on Standard
• Not for you if you need white-label reports, as there aren't any
• Tight if you start on Lite, with 15 prompts, one workspace, no API or MCP, and no extra prompt packs
• Pricey if you outgrow Lite, as Standard is $160 a month yearly and extra prompts are $99 per 100, with 300 at most before Premium at $422
• Watch out: Claude is tracked through its API using the Haiku model, and crawler analytics needs server log files you upload

Pick Sellm if

• Fits if single AI answers feel too random and you want each prompt run ten times
• Works for teams that want an API and an MCP server on the entry plan

Look elsewhere if

• Skip it if you need daily numbers, as checks are weekly unless you're on the custom Agency plan
• Tight if you track many engines and regions, since each one uses up prompts
• Not for you if three days is too short to judge a tool, as that's the whole trial
• Too light for agencies: white-label reports and multi-brand monitoring need the custom Agency plan
• Pricey if 200 prompts runs out, as the next step is Pro at $249 a month

Otterly.AI

• Google AI Mode and Gemini cost $9, $59 or $149 a month each by plan, and Claude $29, $109 or $439, so all seven engines on Standard add $227 a month.
• Google AI Mode, Gemini and Claude are paid add-ons on every plan; Claude is tracked through its API using the Haiku model.
• Lite has one workspace; extra prompts are sold in packs of 100 on Standard and Premium only.
• There is no white-label option; the Looker Studio connector is the suggested way to brand client reports.

Sellm

• Prompts are re-checked weekly, not daily; only the custom Agency plan can choose its own schedule.
• Usage counts each prompt once per engine and region, so tracking many engines or countries uses the allowance faster.
• The free trial is 3 days and covers the Essential plan only.
• White-label reports and multi-brand monitoring need the custom Agency plan.

Otterly.AI

Daily prompt monitoring

Tracks set prompts every day and reports brand mentions, coverage, share of voice and sentiment per engine, in more than 70 countries.

Link citation analysis

Shows which URLs and domains each AI engine cites for a prompt, with a domain ranking to find the sources worth targeting.

AI prompt research

Suggests prompts customers are likely to ask AI search tools about a brand or topic, as a starting set to monitor.

GEO audit

A technical audit of site URLs for generative engine readiness; Lite allows 1,000 audited URLs a month, Premium 10,000.

Agent Analytics

Reports AI agent and crawler visits to your site from server log files you upload.

API, MCP and Looker Studio

An API and MCP server give programmatic access to the data; the Looker Studio connector comes with Standard and above.

Sellm

Six AI engines

Tracks ChatGPT, Google AI Overviews, Perplexity, Gemini, Grok and Microsoft Copilot, with every engine and region on each plan.

Ten runs per prompt

Runs each prompt ten times per engine every week and reports the share of runs that name the brand, rather than a single answer.

Position, sentiment and share of voice

Shows where the brand ranks among recommended options, the tone of mentions and how competitors compare.

Citation tracking

Lists the URLs and channels each engine cites for a prompt, so you can see where to get your brand placed.

Opportunity discovery and audits

Highlights prompts with high volume and low competition, and audits pages for the signals Sellm links to being cited.

API and MCP

An API and MCP server give access to projects, prompts and analyses from your own tools, from the Essential plan.

Otterly.AI

• Lite$25

  per month, billed yearly ($29 billed monthly)

  15 prompts tracked daily on ChatGPT, Google AI Overviews, Perplexity and Copilot, unlimited team members, one workspace. No API, MCP or extra prompts.

• Standard$160

  per month, billed yearly ($189 billed monthly)

  100 prompts, API, MCP and Agent Analytics. Extra prompts are $99 per 100 a month, up to 300 more before you must move to Premium.

• Premium$422

  per month, billed yearly ($489 billed monthly)

  400 prompts with everything in Standard. Extra prompts are $99 per 100 a month.

• EnterpriseCustom

  From 1,000 prompts, with SSO, custom terms, a quarterly GEO health check and a dedicated success manager.

Sellm

• Essential$89

  per month for 200 prompts checked weekly

  2,000+ AI queries a week (each prompt run 10 times), all engines and regions, optimization guide, API access and email support.

• Pro$249

  per month for 1,000 prompts checked weekly, billed monthly

  10,000+ AI queries a week, advanced reporting and analytics, priority email support.

• AgencyCustom

  Unlimited prompts on your own schedule, 5, 10 or 20 runs per query, multi-brand monitoring, white-label reports and Slack support.

• EnterpriseCustom

  Everything in Agency plus a dedicated account manager, custom integrations, SLA guarantees and phone support.