Duolingo and Zeta Global present contrasting investment cases in the software sector for 2026. Duolingo reported fiscal 2025 revenue of $1 billion, up 38.7% year over year, with net income of nearly $414.1 million and a net margin close to 39.9%, while Zeta Global posted revenue close to $1.3 billion, up 29.7%, but a net loss of roughly $31.5 million and a net margin of about -2.4%. Duolingo faces revenue concentration risk from Apple and Alphabet, which together accounted for roughly 82% of total revenue in 2025, and is under investigation by law firms concerning potential federal securities law violations as of April 2026. Zeta Global relies on its top 10 customers for more than one-third of total revenue and must navigate data privacy laws like GDPR. Zeta Global trades at a forward P/E of 19.9x and a P/S ratio of 3.6x, compared to Duolingo's 42.9x forward P/E and 5.5x P/S ratio, with a sector benchmark forward P/E of 36.4x.
Zeta Global Holdings CorpZeta Global is compared to Duolingo; it has revenue growth but net loss, and faces data privacy risks; no clear positive or negative news.
Apple Inc.
Alphabet Inc Class C
Duolingo IncUnder investigation for potential federal securities law violations as of April 2026.