Stack AI vs FastGPT vs Harpa vs Pipefy

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Stack AI
vs
Competitor 1
FastGPT
Competitor 2
Harpa
Competitor 3
Pipefy
Compare
4 tools · best value per row highlighted
Your tool Stack AI
stack-ai.com
Connect AI models visually
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Competitor FastGPT
fastgpt.io
FastGPT is an open-source platform for building AI agents and knowledge-base applications.
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Competitor Harpa
harpa.ai
HARPA AI is a Chrome Extension and NoCode RPA platform that automates web tasks to save time and money. It uses a hybrid AI engine built on ChatGPT and Machine Learning to perform tasks such as provid
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Competitor Pipefy
pipefy.com
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Traffic estimated monthly website traffic
Monthly visits
6.3Kvisits/mo
—
281.1Kvisits/mo
2.7Mvisits/mo
MoM change
▼ 57.9%
—
▼ 18.4%
▲ 13.8%
6-month growth
-93.7%
—
-55.5%
+18.7%
Global rank web
#1,700,092
—
#170,120
#17,377
Avg. last 3 months
13.9K
—
326.3K
2.6M
Bounce rate lower is better
39%
—
53%
45%
Pages / visit
1.8
—
1.6
7.4
Visit duration
14s
—
1m 09s
9m 54s
Traffic sources
—
—
● Direct 95% · ● Referral 4%
● Direct 80% · ● Mail 13%
Stack AIFastGPTHarpaPipefy
0726.4K1.5M2.2M2.9MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KHarpa · 269.4KHarpa · 340KHarpa · 397.4KHarpa · 367.5KHarpa · 631.4KHarpa · 457.2KHarpa · 421.2KHarpa · 353.4KHarpa · 344.4KHarpa · 281.1KPipefy · 2.1MPipefy · 2.2MPipefy · 2.4MPipefy · 2.3MPipefy · 2.9MPipefy · 2.4MPipefy · 2.6MPipefy · 2.4MPipefy · 2.7M1K10K100K1M10MStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KHarpa · 269.4KHarpa · 340KHarpa · 397.4KHarpa · 367.5KHarpa · 631.4KHarpa · 457.2KHarpa · 421.2KHarpa · 353.4KHarpa · 344.4KHarpa · 281.1KPipefy · 2.1MPipefy · 2.2MPipefy · 2.4MPipefy · 2.3MPipefy · 2.9MPipefy · 2.4MPipefy · 2.6MPipefy · 2.4MPipefy · 2.7MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Freemium
Starting price
Free tier
CNY 99per month · free tier available
€14.3per month
Free tier
Free tier
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Free trial
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–
–
API access
–
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Plans
—
Free Edition FreeBasic Edition $99/moAdvanced Edition $599/moCustom Edition Custom
Everyone €14.30/moPro €19.60/moLife €238
Starter FreeBusiness CustomEnterprise Custom
Capabilities input → output
Input
DataDocumentsText
DocumentsTextWeb pages
TextWeb pages
DataText
Output
Apps
Apps
DataText
Apps
Skill level
Intermediate
Advanced
Intermediate
Intermediate
Categories
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Chatbots & CompanionsEducation & LearningProductivity & OfficeAI Agent+2 more
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeVideo Editing+7 more
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
7
9
10
4
Agents
Workflows
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Agent creation
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No-code
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Chatbots
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Chrome extensions
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–
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Knowledge bases
–
–
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RAG
–
–
–
Business automation
–
–
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Chatbot building
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–
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Email automation
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–
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Process automation
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–
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Self hosted
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–
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Summarizing
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–
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Video summaries
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–
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Web scraping
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–
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Customer support chatbot
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–
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Email management
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–
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Finance workflow automation
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–
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SEO
–
–
–
Web browsing
–
–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
–
–
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.