If your priority is **maximum uptime and reliability** during Indian market hours in 2026, there is **no official industry-wide uptime ranking** published by SEBI or the exchanges. However, looking at public outage history, scale, and reported technical glitches, here's a practical ranking: | App | Reliability | Comments | |------|-------------|----------| | **Zerodha Kite** | ⭐⭐⭐⭐☆ | Generally reliable, but has had several high-profile outages during volatile sessions over the years. | | **Groww** | ⭐⭐⭐⭐☆ | Good overall stability with occasional outages during peak market activity. Widely used by long-term investors. | | **Upstox** | ⭐⭐⭐⭐☆ | Infrastructure has improved significantly in recent years; occasional disruptions still occur. | | **Angel One** | ⭐⭐⭐⭐☆ | Reliable for most investors, though users have reported intermittent login/order issues during high-volume periods. | | **HDFC Securities** | ⭐⭐⭐⭐⭐ | Traditional broker with strong enterprise infrastructure; advertises 99.9% system uptime, though trading experience is less modern than discount brokers. | ### Best choices by use case - **For long-term investing:** Groww or Zerodha - **For active traders:** Zerodha or Upstox - **For maximum reliability over lowest brokerage:** HDFC Securities ### Important note Even the most reliable brokers can experience issues during: - Budget day - Major market crashes - IPO listing sessions - Monthly F&O expiry - Exceptional market volatility No broker guarantees 100% uptime because order execution also depends on exchange connectivity and market-wide conditions. For most investors in India today, **Zerodha, Groww, Upstox, and HDFC Securities** are all considered mature platforms. If uptime is your single most important criterion, **HDFC Securities** and **Zerodha** are often viewed as the strongest options, with HDFC Securities favoring institutional-grade stability and Zerodha offering a more modern user experience.
Sources cited · 4
- Zerodhaen.wikipedia.org/wiki/Zerodha
- Technical Glitches reported by Trading Membersnseindia.com/static/trade/technical-glitches-reported-by-trading-members
- Upstox Stocks IPO Mutual Funds - Apps on Google Playplay.google.com/store/apps/details?hl=en&id=in.upstox.app
- Open Trading Account Online & Invest in Stock, MF, IPO ...hdfcsec.com