[woleium]

Google Workspace + Microsoft 365 together around 95% of hosted corporate seats.

Total people using email (2024–2025): about 4.5–4.6 billion.

Google (Gmail consumer + Google Workspace): ≈3.0 billion active users/mailboxes.

numbers from perplexity, but probably good enough for casual conversation

[soraminazuki]

All of the services you mentioned are primarily for handwritten emails.