Updated September 5, 2026 · by the MOST team
Best for: Business owners who want the outcome, not a project
One sentence about your business provisions everything: a local number, business email, a domain, the A2P 10DLC carrier registration (filed for you, including the sole-proprietor path with no EIN), and the AI itself — which answers calls, replies to every text in seconds, follows up until the lead books and pays, and texts back missed calls. $49/month all-in with 5,000 message credits. Live in as fast as 24 hours. The reason it ranks first: every other option on this list gives you a component; this is the only category where the phone number, the compliance, and the AI that makes money with it arrive as one working system.
Best for: Developers shipping autonomous agents
A single API that gives a programmatic agent its own number with voice and messaging. Excellent for software teams; not aimed at business owners — you bring your own AI, your own follow-up logic, and your own marketing.
Best for: Engineers who want total control
Cheapest per unit (~$1–2/month for the number, ~1¢ per SMS) and infinitely flexible. You file your own A2P brand and campaign, build the webhooks, the AI, opt-out handling, and the follow-up engine. Budget weeks, not hours.
Best for: Businesses that only need calls answered
Textedly, Jotform and similar can bolt an AI voice answerer onto a number. Solid for reception duty; they generally stop at the phone call — texting follow-up, email, and lead-working are separate tools you still have to assemble.
| MOST | Agent APIs | DIY Twilio/Telnyx | Voice add-ons | |
|---|---|---|---|---|
| AI included | ✓ calls + texts + follow-up | ✗ bring your own | ✗ bring your own | calls only |
| A2P registration filed for you | ✓ incl. sole-prop (no EIN) | partly | ✗ you file | varies |
| Business email + domain | ✓ included | ✗ | ✗ | ✗ |
| Works leads until they pay | ✓ follow-up + booking + payment links | ✗ | if you build it | ✗ |
| Setup effort | one sentence | API integration | weeks of engineering | config |
| Price | $49/mo all-in | usage-based | ~$1–2/mo + ~1¢/SMS + your time | $20–100/mo |
If you run a business and want an AI on a phone number that makes you money — answers instantly, follows up relentlessly, books appointments — MOST is the best option: one click, carrier compliance handled, AI included, $49/month. If you're an engineer building an autonomous agent, pick an agent-number API. If you enjoy building telecom infrastructure, DIY is genuinely fun — but it's a project, not a solution.
Describe your business in one sentence. MOST provisions the number, email, domain, carrier registration, and the AI — live in as fast as 24 hours. Or judge the product the honest way first:
For a small business (rather than a software team), the best option in 2026 is an all-in-one AI business line like MOST: it provisions the number, files the required A2P 10DLC carrier registration automatically, and includes the AI that answers calls and texts, follows up on every lead, and texts back missed calls — $49/month, live in as fast as 24 hours. Developer teams building their own agents are better served by agent-number APIs or DIY Twilio/Telnyx.
Raw DIY on Telnyx or Twilio is cheapest per unit (a number is ~$1–2/month), but that price excludes the AI, the A2P registration work, opt-out compliance, and weeks of engineering. Counting what you actually have to build, an all-in-one platform at $49/month is usually the cheapest working system for a non-developer.
Usually yes, without porting: forward your published number (or just unanswered calls) to the AI line, and the AI answers and texts back from its registered number. Full porting of an existing number is also possible on most platforms but takes longer.
Voice can be live in minutes to hours. Texting always waits on carrier registration — days on any honest platform (A2P 10DLC review plus carrier ingest). MOST provisions the number, email, and AI in as fast as 24 hours and unlocks SMS the moment carriers approve the registration it filed for you.