If **uptime and reliability** are your top priorities in India (2026), there is no independent, audited ranking that definitively proves one investing app has the highest uptime. All major brokers experience occasional outages, especially during periods of extreme market volatility. The NSE also publishes reports of technical glitches reported by trading members, which shows that incidents can occur across multiple brokers. Based on reliability, scale, engineering reputation, and historical performance: 1. **Zerodha Kite** – Strong platform with a large engineering team and transparent communication during incidents. It has had notable outages in the past, but remains one of the most trusted platforms. 2. **Groww** – India's largest broker by active clients with a simple investing experience and generally solid reliability. 3. **Upstox** – Good infrastructure and popular among active traders, though like all brokers it has experienced occasional disruptions. 4. **ICICI Direct** – Favored by investors who prioritize stability and bank-backed infrastructure over the lowest costs. 5. **Angel One** – Robust feature set and broad user base, with reliability improving over recent years. For long-term investing where execution reliability matters more than advanced trading features, many investors prefer: - Zerodha - Groww - ICICI Direct If you trade intraday or F&O and uptime is critical, it's also sensible to maintain a **secondary broker account** so you have a backup if one platform has an outage during market hours. If your goal is specifically **"least downtime for intraday trading"**, I can rank brokers on that criterion instead.
Sources cited · 5
- Technical Glitches reported by Trading Membersnseindia.com/static/trade/technical-glitches-reported-by-trading-members
- Zerodhaen.wikipedia.org/wiki/Zerodha
- Groww (company)en.wikipedia.org/wiki/Groww_%28company%29
- Best Trading Apps in India (2026): In-Depth Reviewlendenclub.com/blog/best-trading-apps
- 15 Best Trading Apps in India 2026 for Beginners & Traderspacefin.in/best-trading-apps