The 256 limit — why it exists and why it's not going away
WhatsApp's free Business App caps each broadcast list at 256 contacts. Recipients only get the message if they've saved your number. This limit is intentional — it forces spammers into the paid API where Meta can track and rate-limit them, and it prevents personal WhatsApp accounts from being abused for bulk marketing.
Ways people try to escape the 256 cap that don't work:
- Multiple broadcast lists of 256 each. Meta throttles rapid-fire broadcasts. Second and third lists trigger delivery delays and eventual number ban.
- Chrome extensions that automate WhatsApp Web. Detected within 1-3 days. Permanent ban.
- Mod APKs (GB WhatsApp, WhatsApp Plus, Aero). Instant ban when detected — usually within a week of install.
- "Bulk WhatsApp sender" desktop tools. Same detection pattern. Not worth the $30-100 tool cost + $200 to buy a new number after ban.
The one legal path — WhatsApp Business API
The official WhatsApp Business API is Meta's designated channel for bulk messaging at scale. Unlimited recipients, first message must be a pre-approved template, subsequent replies in the 24-hour window are free-form.
What you actually get
- Broadcast to unlimited recipients (single send, no per-list cap)
- Template messaging for Marketing / Utility / Authentication categories
- Send outside the 24-hour customer service window
- Delivery + read + reply analytics per recipient
- Quality-rating dashboard (green / yellow / red)
- Multi-agent inbox for replies
- Integrations with CRM, ERP, e-commerce platforms
Pricing for unlimited broadcast
Two layers: Meta charges per conversation, your Business Solution Provider (BSP) charges a monthly platform fee.
Meta per-conversation (India example)
- Marketing: $0.0125 per conversation
- Utility: $0.004 per conversation
- Authentication: $0.002 per conversation
BSP platform fee (India)
- Go4whatsup Standard: $39/month (unlimited agents, AI included)
- AiSensy Basic: ~$29/month (3 agents)
- WATI Growth: ~$29/month (5 agents)
- Interakt Growth: ~$29/month (5 agents)
Real example — 10,000 marketing broadcast
Meta cost: 10,000 × $0.0125 = $107. Platform fee: $39 (Go4whatsup). Total: $146. That's ~₹1 per delivered message — cheaper than SMS for far higher engagement.
Warm-up rules (critical for a fresh number)
A brand-new API number starts at ~250 messages/day limit and scales as your quality rating stays green. Don't skip warm-up — sudden 10x spikes trigger auto-yellow within 500 messages.
- Week 1: Max 250 messages/day. Use for Utility (order updates) only.
- Week 2: Scale to 1,000/day. Add small Marketing sends to highly-engaged customers.
- Week 3: 5,000/day if quality stays green. Expand marketing lists.
- Week 4+: 10K-100K/day if quality green. Standard tier limit is 100K conversations/day per number.
Quality-rating protection
Meta rates every API number green / yellow / red based on block-rate and report-rate.
- Green: full daily limit (up to 100K/day on standard tier)
- Yellow: capped at 1,000 conversations/day
- Red: capped at 10/day or blocked entirely
How to stay green:
- Only send to opt-in contacts (Meta rule)
- Include "Reply STOP to unsubscribe" in every marketing template
- Personalize the first 40 characters (Meta's spam classifier weights the opening)
- Segment aggressively — VIP first, cascade to broader list only if block-rate stays under 1%
- Match send frequency to prior consent (opt-in for order updates ≠ weekly promo)
Setup time — real numbers
Fresh API onboarding: 24-72 hours end-to-end. Bottleneck is usually Meta Business Manager verification (1-5 business days if paperwork is clean).
- Sign up with BSP → 5 minutes
- Meta Business Manager verification → 1-5 days (Meta review)
- Number onboarding to API → 1-3 hours (BSP handles)
- First template submission → 1-24 hours approval
- Warm-up week 1 begins → live
Bottom line
If you need to broadcast to more than 256 people, the WhatsApp Business API is the only path that doesn't end in a banned number. Total cost for a small business sending 10K marketing broadcasts per month: roughly $140-155 all-in on Go4whatsup Standard. That's a mature, scalable channel — not a workaround.