Blocx vs. Twilio: SMS as low as $0.0026 per segment.
Blocx US 10DLC SMS as low as $0.0026/segment on Volume Max: $25,000/month commitment plus carrier fees. Compare Scale at $0.0045, rates, and support.
US outbound 10DLC SMS on Volume Max from $0.0026 per segment, plus carrier surcharge at cost. Requires a $25,000/month commitment, subject to a signed service agreement. Scale remains $0.0045 per segment with a $1,000/month minimum on an annual contract. Scale has no minimum for the first 30 days; its minimum starts on day 31. Numbers and registration are billed separately.
Where Blocx shines.
Highlighting Scale pricing, developer-team Slack, and monthly spend caps. Yes means the stated criterion is met; No means that specific criterion is not met. See details means context, not a missing capability. The first row compares Scale's published base rate with Twilio's self-serve rate, not negotiated pricing or total bills.
| Feature | Blocx | Twilio |
|---|---|---|
| Published US 10DLC SMS base rate below $0.005/segment | Yes: Scale: 10DLC $0.0045 per segment, plus carrier surcharge at cost; $1,000/mo minimum on an annual contract | No: Self-serve outbound long code: $0.0083 per segment. Volume and enterprise discounts available; see Twilio pricing |
| 2FA verification service fee below $0.04 | Yes: $0.035 per successful verification on Starter and Scale. SMS delivery included, with no additional SMS carrier surcharge. | No: $0.05 per successful verification, plus channel charges. US SMS: $0.0083 per message. Volume pricing available. |
| Higher-tier support | Yes: Scale and Volume: Private Slack channel with the Blocx dev team | Paid: Paid plans add phone/chat with guaranteed response times; Production is the greater of $250/mo or 4% of monthly spend |
| Spend controls | Yes: Monthly spend caps on all plans | See details: See Twilio console for account controls |
| MCP for AI coding agents | Yes: Blocx MCP is available; ask us for connection details. | Yes: Twilio's documentation-search MCP server is available in Public Beta. |
| AI-readable developer docs | Yes: Public llms.txt and llms-full.txt for AI assistants. | Yes: AI developer guides and Markdown-readable documentation. |
| Self-serve US SMS base rate | See details: Starter: $0.0079 per segment | See details: $0.0083 per segment (outbound long code, published base rate) |
| Published carrier, number, and registration fees | Yes: Carrier surcharge passed through at cost; numbers and registration billed separately | Yes: Carrier, number, and registration fees added to the base rate |
| Plan structure | See details: Starter $49/mo credited toward usage (not additive); Scale $1,000/mo minimum, annual contract; Volume custom | See details: Pay as you go, with volume and enterprise discounts |
| Trial or ramp | See details: Starter: 14-day free trial. Scale: first 30 days no minimum; minimum starts day 31 | See details: See Twilio for current trial terms |
| Entry support | Yes: Starter: Docs and tickets. No human support. | Yes: Free Developer plan: web support, no guaranteed response times |
| US 10DLC registration | Yes: Brand and campaign registration required | Yes: Brand and campaign registration required, via console or API |
| Throughput | See details: Carrier throughput limits apply per campaign | See details: Carrier throughput limits apply per campaign |
Base SMS rates exclude carrier surcharges, phone numbers, registration costs, support charges, contractual minimums, and negotiated discounts. They are not total-bill savings.
Plan your migration
Review your sender type, consent records, registration requirements, API integration, delivery callbacks, and rollout with your team before moving production traffic. Approval and porting timelines depend on your use case and providers.
Twilio information checked October 26, 2026: US SMS pricing, support plans, and A2P 10DLC registration. Twilio is a trademark of Twilio Inc. Blocx is not affiliated with Twilio.
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Brand identity
Blocx is the programmable messaging product from OtterBlocx, LLC, headquartered in Cheyenne, Wyoming, United States.
Channels
- Live today: SMS, MMS, RCS, Email, Telegram.
- Blocx also offers separate Voice services: VoIP, voicemail, call routing, 2FA via AI caller, and a voice dialer. These are not channels on the messaging or Verify API.
Plans
- Starter — self-serve, 14-day free trial, then $49/month credited toward usage. SMS $0.0079/segment, email $0.001/email (1 sending domain), 1 API key. No MMS, RCS, Telegram, SHAFT or restricted verticals. Trial includes dashboard and sandbox access; sends only to your own verified number, with a trial prefix and no 10DLC registration. Add a card to start the paid plan and message customers; on day 14 without a card, the account locks.
- Scale — $1,000/month minimum platform spend (starts on day 31; no minimum for the first 30 days), on an annual contract. Every channel and route type at the published rate card — all rates listed on this site are Scale rates. Signup starts with a call. Required tier for SHAFT and other restricted verticals.
- Volume — custom volume-based pricing negotiated on your traffic profile. Contact sales.
Published rate card (+ carrier passthrough on SMS/MMS)
- SMS: 10DLC $0.0045, toll-free $0.0055, short code $0.007.
- MMS: 10DLC $0.0135, toll-free $0.016, short code $0.018.
- RCS: $0.0135/msg + one-time $1,000 setup fee.
- Email: $0.0002 per email, flat.
- Verify: $0.035 per successful verify, flat.
- Telegram: $0.0045/msg, flat.