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Epsilla (YC S23)

All-in-one platform to create AI agents with your knowledge

★★★★★ 5.0/5
FactScore™ 15.1
VS

OpenAI o1

AI that can do general-purpose complex reasoning

★★★★★ 5.0/5
FactScore™ 54

Updated February 2026

Epsilla (YC S23) OpenAI o1
Rating 5.0★ 5.0★
Reviews 1 11
Pros 10 1
FactScore™ 15.1 54

FactScore™ Comparison

FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.

15.1
Epsilla (YC S23) FactScore™
👑
54
OpenAI o1 FactScore™
★ OpenAI o1 wins on FactScore™

Pros & Cons

Only in Epsilla (YC S23) — Pros

Easy to use Fast performance Helpful support High quality retrieval Knowledge search API access Community support Supports multiple data formats UI builder Vector database managed service

Both tools — Pros

—

Only in OpenAI o1 — Pros

Ai features

Only in Epsilla (YC S23) — Cons

Expensive pricing

Both tools — Cons

—

Only in OpenAI o1 — Cons

Difficulty canceling subscription Limited conditional logic complexity

Details

Epsilla (YC S23) OpenAI o1
Categories LLMs, AI Chatbots, AI Infrastructure Tools LLMs
Platforms Web Web
Became Popular September 20, 2024 September 13, 2024
Website epsilla.com openai.com

Who Should Pick Which?

Choose Epsilla (YC S23) if...

  • Easy to use
  • Fast performance
  • Helpful support

Choose OpenAI o1 if...

  • Ai features

With a FactScore™ of 15.1 vs 54, OpenAI o1 leads in community reception. Epsilla (YC S23) uniquely offers Easy to use and Fast performance, while OpenAI o1 stands out for Ai features.

3

What Users Say

Epsilla (YC S23)

K
Kunal Oct 11, 2024
★★★★★

I did a lot of research until I found Epsilla. Epsilla is the single best tool for non-technical teams to build meaningful AI services around knowledge bases. The best part is the quality of knowle...

OpenAI o1

M
Max Jan 24, 2025
★★★★★

We power our AI chart generation through o1 to get high quality visualizations for any data question. o1 is able to deeply understand any data source, including complex custom databases.

C
Chris Dec 6, 2024
★★★★★

ChatGPT Pro includes o1 pro mode, a version of o1 that uses more compute to think harder and provide even better answers to the hardest problems.

R
Richard Oct 25, 2024
★★★★★

OpenAI's o1 model, with its advanced reasoning and planning capabilities, significantly enhances our decision-making process.

Frequently Asked Questions

Which is better, Epsilla (YC S23) or OpenAI o1?

Based on FactScore™, OpenAI o1 leads with a score of 54 vs 15.1. OpenAI o1 has a higher rating of 5.0★ compared to 5.0★.

What are the pros of Epsilla (YC S23) compared to OpenAI o1?

Epsilla (YC S23) uniquely offers: Easy to use, Fast performance, Helpful support, High quality retrieval, Knowledge search.

What are the pros of OpenAI o1 compared to Epsilla (YC S23)?

OpenAI o1 uniquely offers: Ai features.

Is Epsilla (YC S23) better rated than OpenAI o1?

Epsilla (YC S23) is rated 5.0★ from 1 reviews. OpenAI o1 is rated 5.0★ from 11 reviews.

What is the FactScore™ of Epsilla (YC S23) and OpenAI o1?

FactScore™ weighs rating and review volume together. Epsilla (YC S23) scores 15.1 and OpenAI o1 scores 54.

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