AstroSage is one of the largest Vedic astrology portals — comprehensive, long-established, and free to use for kundli basics. What sends people looking for an alternative is usually the experience around the chart: accounts, advertising, and readings written in traditional shorthand.
Science of Light takes the opposite shape: no account and no ads because there is no server — your chart is computed in your browser and your birth details never leave your device. Accuracy is validated publicly against the Swiss Ephemeris (±0.3′), and every reading is written in plain English first, with the Sanskrit and the classical sources one tap away for those who want depth: full divisionals, shadbala, KP on Placidus cusps, yogas with citations.
If you want horoscope-portal breadth — daily predictions, matchmaking bureaus, gemstone shops — a portal serves that. If you want your own chart, read clearly, with professional-grade math and total privacy, that is what this instrument is for.
Core positions agree closely — both use the sidereal zodiac with Lahiri ayanamsa. Small differences can come from house-system or ayanamsa settings; Science of Light documents its conventions on the methodology page.
Free · no account · computed on your device to ±0.3′ vs the Swiss Ephemeris · methodology