All comparisons



| Visit Comet | Visit Gistify | Visit iAsk.ai | |
|---|---|---|---|
| What it costs | |||
| Pricing | Free | Paid | Freemium |
| Pricing details | Free to download and use; Perplexity says its free version will always include Comet, and Comet has no separate paid plan. | Paid: $9.95/month, or $99.95/year ($8.33/month billed annually), for unlimited searches; a weekly plan is also offered. New accounts get 20 lifetime free searches with no credit card, which is a trial rather than a free plan. | Free tier with unlimited daily searches on the non-Pro model, writer, summarizer and history, supported by limited ads - iAsk Pro $9.95/month for the strongest model without ads |
| Price range | $0/mo | $9.95/mo | $0 - $9.95/mo |
| Free option | Free tier | Free trial only | Free tier |
| Plans |
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| What it is | |||
| What it does | Comet is Perplexity's free AI web browser, with Perplexity search built in and an assistant that summarizes pages, answers questions and completes web tasks. | Gistify sends one question to ChatGPT, Claude, Gemini and Grok at once, then shows where the four models agree, where they differ, and each full answer. | AI answer engine aimed at students and researchers, with a video tutor, document analysis, an Ask 5 AIs comparison mode and unlimited free daily searches. |
| The details | |||
| Tags | ai-browsersearch-engineconversational-aiquestion-answering | conversational-aiquestion-answeringmulti-modelllm-comparisonconsensus | conversational-aiquestion-answeringsearch-enginechatstudents |
What it costs
- Pricing
- Free
- Pricing details
- Free to download and use; Perplexity says its free version will always include Comet, and Comet has no separate paid plan.
- Price range
- $0/mo
- Free option
- Free tier
- Plans
- Free$0/mo
What it is
- What it does
- Comet is Perplexity's free AI web browser, with Perplexity search built in and an assistant that summarizes pages, answers questions and completes web tasks.
The details
- Tags
- ai-browsersearch-engineconversational-aiquestion-answering
What it costs
- Pricing
- Paid
- Pricing details
- Paid: $9.95/month, or $99.95/year ($8.33/month billed annually), for unlimited searches; a weekly plan is also offered. New accounts get 20 lifetime free searches with no credit card, which is a trial rather than a free plan.
- Price range
- $9.95/mo
- Free option
- Free trial only
- Plans
- Pro$9.95/mo
What it is
- What it does
- Gistify sends one question to ChatGPT, Claude, Gemini and Grok at once, then shows where the four models agree, where they differ, and each full answer.
The details
- Tags
- conversational-aiquestion-answeringmulti-modelllm-comparisonconsensus
What it costs
- Pricing
- Freemium
- Pricing details
- Free tier with unlimited daily searches on the non-Pro model, writer, summarizer and history, supported by limited ads - iAsk Pro $9.95/month for the strongest model without ads
- Price range
- $0 - $9.95/mo
- Free option
- Free tier
- Plans
- iAsk Free$0/mo
- iAsk Pro$9.95/mo
What it is
- What it does
- AI answer engine aimed at students and researchers, with a video tutor, document analysis, an Ask 5 AIs comparison mode and unlimited free daily searches.
The details
- Tags
- conversational-aiquestion-answeringsearch-enginechatstudents
Read the full reviews
What each one is actually like to use, tested by hand rather than summarised from the vendor’s own page.
























