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CustomGPT.ai vs FastBots

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. CustomGPT.ai starts at $99, FastBots at $33. Only FastBots has a free tier. Only CustomGPT.ai ships a public API.

CustomGPT.aiBuilds retrieval chatbots from company documents, sites and helpdesk contentFastBotsTrains a chatbot on your site or documents and puts it on the web, WhatsApp, Telegram and Slack

Side by side

FactCustomGPT.aiFastBots
CategoryCustom GPTs & Bot BuildersCustom GPTs & Bot Builders
Pricing modelPaidFreemium
Starts at$99 month$33 month
Public APIYesNo
PlatformsWeb, APIWeb, Slack App
CompanyCustomGPT Inc.FastBots.ai
Launched2023—
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

CustomGPT.ai

A packaged retrieval stack for teams that want a grounded chatbot without assembling their own; the connector breadth and compliance paperwork are what the price buys. At $99/month against a four-figure query cap, the cost per answer is high until volume justifies it.

Pros

  • Answers are constrained to ingested content, which materially cuts invented answers versus open chat
  • 100+ ingestion connectors and a very wide file-format list mean less pre-processing work
  • API supports programmatic agent creation, which suits agency resale
  • SOC 2 Type II certification is unusual at this price point

Cons

  • Query allowance is the real ceiling and it is low relative to the price
  • The step from Standard to Premium is five times the cost with nothing in between
  • Answer quality still depends entirely on how clean and current your source content is
  • No free plan; evaluation is limited to a trial

FastBots

FastBots is the pragmatic end of the bot-builder market: crawl a site, get a working bot, drop it on six messaging channels. Letting you pick the underlying model across three vendors is genuinely useful and not common at this price. The message-credit ceilings are the thing to size carefully, because 2,000 credits disappears fast on a busy site and the overflow add-ons are priced per block.

Pros

  • Choose the underlying model across OpenAI, Anthropic and Google rather than being locked to one
  • One bot serves web, WhatsApp, Telegram, Messenger, Instagram, Slack and email
  • Automatic re-crawling and retraining keeps the bot current as the source site changes
  • Free tier exists, human handover is supported, and 7,000+ apps connect via Zapier and Make

Cons

  • Advertised prices assume annual billing — month-to-month Essential is $39, not $33
  • Message credits are the real constraint — 2,000/month on the $33 tier goes quickly
  • Removing FastBots branding is a $29/month add-on, nearly doubling the entry plan
  • No public API surfaced on the pricing page; integrations route through Zapier or Make

Which one fits

Choose CustomGPT.ai if you need

  • Support teams turning an existing help centre into a self-serve answer bot
  • Agencies spinning up client-branded bots and reselling them through the API
  • Companies that need SOC 2 evidence before any AI touches internal documents

Choose FastBots if you need

  • Small businesses turning an existing website into a support bot quickly
  • Teams that need the same bot on WhatsApp, Telegram and their site
  • Agencies reselling bots under the reseller tier

More comparisons

Browse all Custom GPTs & Bot Builders →