Buyer’s guide
Best free algo backtesting software in India (2026)
Last updated: · Reviewed by the INDfolio AI research desk
Short answer
Genuinely free backtesting for Indian markets exists: AlgoTest offers free NSE options backtesting with real depth, INDfolio AI’s free forever plan includes backtesting on three years of NSE data with the full Indian cost stack plus AI strategy generation, TradingView’s free tier backtests Pine strategies (without Indian charges), and Python with backtrader or a similar library is free if your time is. The limits that actually bite are history depth, number of strategies, validation features and whether live deployment is included — not the backtesting itself.
Disclosure: INDfolio AI publishes this page and INDfolio AI is one of the platforms listed. We have kept every entry factual, named what each competitor does better than us, and quoted no pricing we could not verify — check each platform’s own site before you subscribe.
"Free" covers three very different things in Indian backtesting: genuinely free products, free tiers designed to demonstrate a paid product, and open-source libraries that are free of charge and expensive in hours. All three are legitimate; confusing them wastes weeks.
This round-up says exactly what each free option includes, where the wall is, and who each one suits. One warning applies to all of them: a backtest that ignores brokerage, STT, exchange charges, GST and stamp duty is worse than no backtest, because it produces confident numbers for a strategy that loses money. Check the cost model before you trust any result, free or paid.
The picks at a glance
- INDfolio AI our product — Best free tier for end-to-end strategy work.
- AlgoTest — Best genuinely free options backtesting.
- TradingView (free tier) — Best free charting with a strategy tester attached.
- StockMock (free tier) — Best free quick check on an options structure.
- Python with backtrader — Best free option if your time is free.
- Chartink — Best free NSE scanner (not a backtester).
Comparison table
| Option | What is free | Markets | Indian cost model | Main limit |
|---|---|---|---|---|
| AlgoTest | Options backtesting | NSE F&O | Options-focused | Options-only scope |
| INDfolio AI | Free forever plan | NSE equity, F&O, indices | Full stack per trade and leg | 3 years of data; 1 paper strategy |
| StockMock | Free tier | NSE index options | Options-focused | Tier limits; verify current terms |
| TradingView | Free tier with strategy tester | Global + India | Generic commission only | No Indian charges; no broker execution |
| Python + backtrader | Entirely free, open source | Anything you source data for | Whatever you code | You build and maintain everything |
| Chartink | Free NSE scanning | NSE equity | Not applicable | Screener, not a backtester |
Features and pricing change often. We quote no competitor pricing we cannot verify — confirm current details on each platform’s own site before subscribing.
1. Best free tier for end-to-end strategy work
INDfolio AI our product
INDfolio AI is a no-code, AI-powered algo trading platform for Indian markets whose free forever plan includes AI strategy generation, the visual builder, backtesting on three years of NSE data and one paper trading strategy.
What makes the free tier genuinely useful rather than a demo is that the backtesting is the real engine: three years of NSE equity, futures, options and index history, with brokerage, STT, exchange transaction charges, the SEBI fee, GST, stamp duty and slippage deducted from every simulated trade and every option leg. The number you see is a number you could have earned.
You also get plain-English strategy generation — describe the system, get editable rules — and one paper trading strategy running on live NSE prices, which is the closest thing to a live rehearsal that costs nothing.
The honest limits: three years of history rather than the full archive, five AI generations a month, one paper strategy, and no live broker deployment on the free plan. Walk-forward analysis sits on the top tier. If you are validating whether a strategy idea has merit, none of those limits stop you; if you are running a book, they will.
Strengths
- Free forever, not a time-limited trial
- Full Indian cost stack deducted even on the free tier
- AI strategy generation and the visual builder included
- One paper trading strategy on live NSE prices
- Covers equity, futures, options and indices — not one segment
Limitations
- 3 years of history on free; full archive is a paid feature
- Live broker deployment requires a paid plan
- Walk-forward analysis is on the top tier
- NSE only — no MCX, currency or global markets
Pricing: Free forever plan; paid plans ₹999 and ₹2,499 per month incl. GST, 7-day trial.
2. Best genuinely free options backtesting
AlgoTest
AlgoTest is an Indian options platform offering free NSE F&O backtesting with leg-level control over entries, stops, re-entries and adjustments.
This is the clearest case of free-and-serious in Indian retail trading. The options backtesting is not a teaser — it is the product that built the platform’s reputation, and it goes deeper on leg-level mechanics than most paid tools.
The limit is scope rather than depth: options structures, not equity or futures systems, and execution has historically been the paid side of the product.
Strengths
- Free options backtesting with real depth
- Leg-level stops, re-entries and adjustments
- Large Indian options community
Limitations
- Options-only
- Execution features are paid — check current terms
Pricing: Free backtesting; paid execution — see their site.
3. Best free charting with a strategy tester attached
TradingView (free tier)
TradingView is a cloud charting platform whose free tier includes Pine Script and a strategy tester for backtesting price-based strategies.
For visual, indicator-driven strategies on price series, the free tier is genuinely capable, and the community script library means most ideas have a starting point already written.
The Indian caveat is important: the strategy tester models commission generically and knows nothing about STT, NSE transaction charges, GST or stamp duty. For intraday or options strategies, a profitable-looking Pine backtest can describe a losing strategy. Treat results as directional, then re-test somewhere the Indian stack is applied.
Strengths
- Excellent free charting
- Pine strategy tester included
- Huge library of community scripts
Limitations
- No Indian cost modelling
- No native Indian broker execution
- Limited options backtesting
- Pine is code
Pricing: Free tier plus paid plans — see their current pricing.
4. Best free quick check on an options structure
StockMock (free tier)
StockMock is an Indian options backtesting platform with a free tier for NIFTY and BANKNIFTY strategy simulation and payoff visualisation.
Useful for the fast sanity check: does this structure have any historical merit at all, before you invest effort in testing it properly?
Free-tier limits change, so confirm what is included on their site rather than assuming.
Strengths
- Quick options backtests at no cost
- Clear payoff visualisation
Limitations
- Options-only
- Free-tier limits — verify current terms
Pricing: Free and paid tiers — see their current pricing.
5. Best free option if your time is free
Python with backtrader
Backtrader is an open-source Python backtesting framework, free to use, with market data and cost modelling supplied by you.
Unlimited flexibility at zero licence cost, and the standard route for traders who can code and want total control over the simulation.
The honest accounting: you source and clean Indian market data, implement the Indian cost stack yourself, handle lot sizes and expiry calendars, guard against look-ahead bias, and maintain all of it. Traders routinely spend more hours on that infrastructure than a year of a paid platform costs. Choose it because you want the control, not because it is cheap.
Strengths
- Entirely free and open source
- Complete control over the simulation
- Excellent learning experience
Limitations
- Requires Python proficiency
- You source data and model Indian costs yourself
- Options mechanics are your problem
- Significant time cost
Pricing: Free (open source); data and infrastructure costs are yours.
6. Best free NSE scanner (not a backtester)
Chartink
Chartink is a free Indian stock screener that scans NSE equities against technical conditions and can alert when scans match.
Included as a boundary marker: traders searching for free backtesting often actually want free screening, and for that specific job Chartink is fast, free and India-specific.
It finds candidates; it does not simulate a strategy across history or execute orders. Pair it with a platform that does — INDfolio AI automates Chartink scans into risk-checked broker orders.
Strengths
- Free NSE scanning
- India-specific technical conditions
- Alerts on scan matches
Limitations
- Not a backtester
- Equity focus only
- No execution on its own
Pricing: Free with paid tiers — see their site.
How to choose
Does the free tier deduct Indian charges?
This single question separates a useful free backtester from a harmful one. A strategy that clears a costless simulation and fails once brokerage, STT, exchange charges, GST, stamp duty and slippage are applied is worse than an untested idea, because you now have false confidence in it.
Intraday and options strategies are where the gap is widest: charges routinely exceed brokerage and can consume the entire theoretical edge. Price one of your own typical trades with our free brokerage calculator, then check whether the platform’s cost line is in the same universe.
How much history does free actually give you?
History depth is the most common free-tier limit, and it matters more than it sounds. Three years covers a decent range of conditions; one year of a trending market teaches you almost nothing about how a system behaves when the trend ends.
A useful rule: your backtest window should contain at least one period where your strategy’s core assumption was wrong. If the free tier cannot reach such a period, treat its results as preliminary.
Is validation included, or only the backtest?
Free tiers almost always include the backtest and almost never include walk-forward analysis, parameter stability testing or Monte Carlo simulation — which is reasonable, since those are the features that justify a subscription.
The consequence for you: a free backtest tells you a strategy worked once, on one parameter set, in one window. That is a screening result, not a verdict. Treat it as a filter for which ideas deserve deeper validation, whether paid or hand-built.
Can you actually trade what you tested?
Most free tiers stop before live deployment, which is where the business model lives. That is fair, but plan for it: know whether the paid step exists on the same platform, and whether the strategy definition carries across unchanged or has to be rebuilt somewhere else.
Rebuilding a validated strategy by hand in a different tool is where quiet divergence enters. Platforms where the same definition backtests, paper trades and executes live avoid that failure mode entirely.
What is your time worth?
Open-source backtesting is free of charge and not free of cost. Sourcing Indian market data, modelling the cost stack, handling lot sizes and expiry calendars, and preventing look-ahead bias is weeks of work before the first meaningful result, and it never stops needing maintenance.
That is a good trade if you want total control or are learning deliberately. It is a poor one if you simply wanted to know whether your moving-average idea works — a hosted free tier answers that in an afternoon.
The verdict
For options structures, AlgoTest’s free backtesting is the most generous serious offer in Indian retail trading, and it is free because it is the product rather than a sample of one.
For anything beyond options — equity systems, futures trend-following, or an idea you would rather describe than code — INDfolio AI’s free forever plan gives you the real engine with the full Indian cost stack on three years of NSE data, plus a paper strategy on live prices. The limits are history depth and live deployment, not fidelity.
If you can code and want control, Python with backtrader costs nothing but weeks. If you mainly want charts, TradingView’s free tier is excellent — just re-test anything promising somewhere the Indian charges are applied, because Pine’s tester will not tell you what STT does to your edge.
How this list was made
- Only options an Indian retail trader can actually use today are listed, including one open-source library and one screener, because "free backtesting" means different things to different searchers.
- Each entry gets the use case it genuinely wins rather than a numeric rank across products that are not comparable.
- Free-tier contents change often. Everything here was checked against each platform’s own published terms in September 2026 — verify before relying on any specific limit.
- We quote no competitor pricing figures, user counts or ratings we could not verify, and this site publishes no review stars anywhere.
- INDfolio AI is our product and its free-tier limits are stated explicitly on its own card, including the features that require payment. Facts are re-checked quarterly.
Nothing here is investment advice. Algorithmic trading carries market risk and backtested performance does not guarantee future results — see our risk disclaimer.