
AlgoBacktest
Options Backtesting Engine
Portfolio Backtest
Backtrader
ETFreplay.com
GreeksLab
QuantConnect
A backtester built to catch strategies that only work on paper

Saturn Cloud
Amazon SageMaker
Databricks Unified Analytics Platform
Azure Synapse Analytics
Google BigQuery
GeoSpock
Delta Lake
A collaboration platform for data scientists

Which is more popular?
Based on our record, Deepnote seems to be more popular. It has been mentioned 34 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | honestbacktester.com | status.deepnote.com |
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| Company | Startup from Ireland | — |
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In their own words, as submitted to SaaSHub.


Most backtests flatter you — great numbers in, great numbers out. Honest Backtest Engine is built to do the opposite: it tests your strategy on data it never saw, models real commission, slippage and borrow, deflates the Sharpe for how many combinations you tried, and Monte-Carlo stress-tests the...
No description of Deepnote yet.
What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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Could this be the Best Data Science Notebook? (Deepnote)
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Honest Backtest Engine and Deepnote.
Honest Backtest Engine's answer
Most backtesting tools are built to make a strategy look good. Honest Backtest Engine is built to do the opposite — to catch the strategy that only works on paper before you risk real money on it. Every run headlines out-of-sample results, charges real trading costs, deflates the Sharpe ratio for how many parameter combinations you tried, and Monte-Carlo stress-tests the outcome. It ends in a single believability score from 0 to 100, and it shows you the checks your strategy failed, not just the ones it passed. No other tool leads with the red marks.
Honest Backtest Engine's answer
It was built out of a common, painful experience: strategies that backtest beautifully and then quietly lose money live. That gap is almost always caused by overfitting, ignored costs, look-ahead bias, or a single lucky run mistaken for an edge — and most backtesting tools do nothing to catch it. Honest Backtest Engine exists to run those checks automatically and to be honest about the result, even when the honest answer is "this edge probably isn't real."
Honest Backtest Engine's answer
Because it's designed to tell you the truth rather than flatter you. It models real commission, slippage and borrow costs, it's look-ahead-proof, and it produces a tamper-evident signed report anyone can verify without trusting you. It runs entirely on your own machine — your data and strategies never leave your computer. It's a one-time €149 purchase with every future version included, no subscription. And it comes with a guarantee: if it doesn't catch a backtest that was lying to you within 30 days, you get a full refund.
Honest Backtest Engine's answer
Retail and independent algorithmic traders who build and backtest their own strategies — especially anyone who has watched a great-looking backtest lose money in live trading and wants to know whether an edge is real before funding an account. It suits people comfortable with concepts like Sharpe ratio, overfitting and out-of-sample testing, though the reports are written to be readable without a quant background.
Honest Backtest Engine's answer
Python, with pandas and NumPy for the backtesting engine and data handling. Reports and the local interface are rendered as HTML in the browser. Reports are cryptographically signed using Ed25519 so they can be independently verified. It runs as a self-contained local application on Windows, Mac and Linux.
Share your experience with using Honest Backtest Engine and Deepnote. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of Honest Backtest Engine yet. Be the first one to post
Deepnote is a cloud-based data science notebook platform comparable to Jupyter Notebooks but with a focus on real-time collaboration and editing. It lets users write and run code in several programming languages, as...
Deepnote is a real-time collaborative notebook. It offers features like real-time collaboration, version control, and smart autocomplete. It also provides direct integrations with popular data sources like GitHub,...
Deepnote is a cloud-based, data science notebook platform that is similar to Jupyter Notebooks, but with a focus on collaboration and real-time editing. It allows users to write and execute code in a variety of...
Recommendations tracked on public social media and blogs since March 2021.


Tracking Honest Backtest Engine since Jul 2026.
Thank you for the list - I think I've come across all of these in my research! I'll try highlight the differences for each. - https://noteable.io/ - as you say, it doesn't exist anymore - https://deepnote.com - I actually mentioned this... - Source: Hacker News / over 2 years ago
- https://deepnote.com -- also extensive AI integration and realtime collaboration. - Source: Hacker News / over 2 years ago
Deepnote - A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, up to 750 hours of standard hardware, and teams with up to 3 editors. - Source: dev.to / almost 3 years ago
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