Send bulk WhatsApp messages to your contact list from a spreadsheet

flowchart TD trig[\"contacts marked ready to message"\]:::trigdata s0[["check phone number validity"]]:::mi s1["send message to valid contacts"]:::task s2[("update spreadsheet with status")]:::store trig --> s0 s1 --> s2 gx{"× is number active on whatsapp"}:::gate s0 --> gx p00["send message"]:::task gx -->|"valid number"| p00 p10["skip contact"]:::task gx -->|"invalid number"| p10 jn{"○ record result"}:::gate p00 --> jn p10 --> jn jn --> s1 out[/"messages sent to valid contacts"/]:::out pay{{"outreach tracked without manual work"}}:::pay s2 --> out out --> pay s1 -. "failures recorded, run continues" .-> out classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff