If your priority is **uptime and reliability during market hours**, there is no publicly audited, industry-wide uptime ranking for Indian investing apps in 2026. Most brokers do not publish detailed uptime percentages. However, based on reported outages, exchange disclosures, infrastructure maturity, and market reputation, the practical ranking is: | Broker/App | Reliability reputation | Notes | |------------|------------------------|-------| | Zerodha | Very high | Mature infrastructure, but has experienced notable glitches and market-open incidents. | | Groww | High | Large scale and generally stable, though affected by industry-wide outages. | | Upstox | High | Competitive infrastructure; NSE technical-glitch reports show occasional incidents. | | Angel One | Medium–High | Historically has had some high-profile outage complaints during volatile sessions. | | ICICI Direct | High | Full-service broker with strong banking integration. | | HDFC Securities | High | Generally considered dependable for long-term investors. | ### For different investor types - **Best overall for uptime-focused investors:** Zerodha - **Best beginner app:** Groww - **Best backup broker:** Upstox or ICICI Direct - **For serious traders:** Many active traders maintain both Zerodha and Upstox accounts to reduce single-platform risk. ### Important reality Many major "broker outages" in 2025–2026 were actually caused by shared infrastructure providers or exchange-side issues. For example, a major Cloudflare outage simultaneously affected Zerodha, Groww, Upstox, and Angel One, so even the most reliable broker can be unavailable if a common dependency fails. ### My practical recommendation for 2026 1. Primary account: Zerodha 2. Backup account: Upstox or Groww 3. For portfolios above ₹10 lakh, keep a second broker account regardless of which app you choose. Are you mainly doing **long-term investing**, **swing trading**, or **intraday/F&O trading**? The best app changes depending on that.
Sources cited · 3
- Zerodha hit by technical glitch, users face login & price update issueseconomictimes.indiatimes.com/markets/stocks/news/zerodha-hit-by-technical-glitch-users-face-login-price-update-issues/articleshow/123669430.cms
- Cloudflare down: Brief outage hits trading platforms like ...moneycontrol.com/technology/cloudflare-down-outage-hits-trading-platforms-like-zerodha-groww-and-others-article-13712483.html
- Technical Glitches reported by Trading Membersnseindia.com/static/trade/technical-glitches-reported-by-trading-members