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Honest Comparison

FollowUp vs OpenPhone: SMS Follow-Up vs Business Phone

TL;DR

OpenPhone is a cloud business phone system: shared business numbers, voice, SMS, voicemail transcription. FollowUp is an SMS follow-up automation tool: AI-driven cadences, reply classification, voicemail drops. They overlap on SMS but solve different jobs. OpenPhone replaces your business landline. FollowUp replaces the manual work of texting every lead a follow-up sequence and reading every reply. Many sales teams use both: OpenPhone for the team's shared business line, FollowUp for the rep's personal SMS follow-up motion.

Quick verdict: who should pick which

Choose FollowUp if
  • You want SMS follow-up sequences with AI reply filtering
  • You want to text from your own iPhone number, not a business line
  • You need ringless voicemail drops
  • Your job is sales follow-up, not business phone management
Choose OpenPhone if
  • You need a shared business phone number for the team to call/text from
  • You want voicemail transcription, IVR, and call routing
  • You're replacing a desk phone or a Google Voice setup
  • You need a business line, not a follow-up automation tool

Feature comparison

Feature FollowUp OpenPhone
Primary purpose SMS follow-up automation Business phone system
SMS automation cadences Yes: built-in workflows Auto-replies and snippets, not full cadences
AI reply classification Yes No (basic AI summaries in beta)
Ringless voicemail Yes (Pro tier) No
SMS from rep's own phone Yes: iMessage on Pro tier No: OpenPhone provisioned number
Voice calls Inbound voice agent only Full inbound + outbound voice
Voicemail transcription Inbound voice agent transcribes Yes: primary feature
Shared team numbers Per-rep numbers (Business tier) Yes: shared inboxes are core
Free tier Yes: 3 blasts/day, 10 recipients each No (7-day trial)
Built for Sales follow-up reps Small business teams needing a business line

When to use each

FollowUp

FollowUp wins when the job is sales follow-up automation, not phone system management. The rep wants to set up an SMS cadence, have it run in the background, and only see leads who reply with intent. Texts come from the rep's own iPhone (Pro tier) so they feel personal. OpenPhone's shared inbox model isn't what a 1:1 follow-up rep needs.

OpenPhone

OpenPhone wins when the job is replacing a business landline or shared phone setup. A small team that needs one business number where calls and texts route to whoever's available, plus voicemail transcription and call recording. That's exactly what OpenPhone is built for. SMS in OpenPhone is conversational, not campaign-driven.

Pricing

OpenPhone has per-user pricing (Starter, Business, Scale) with annual discounts. SMS is included in all tiers as part of the phone-line bundle. FollowUp has a free tier plus per-rep Pro and Business tiers. The two are often complementary rather than competitive: OpenPhone for the team's shared business line, FollowUp for each rep's outbound SMS follow-up motion. Verify current rates: openphone.com/pricing and myfollowup.io.

Frequently asked questions

Is FollowUp an OpenPhone alternative?
Not directly. OpenPhone is a business phone system; FollowUp is an SMS follow-up tool. They overlap on SMS but solve different problems. If you need a business phone line, FollowUp does not replace OpenPhone. If you need automated SMS follow-up sequences with AI reply filtering, OpenPhone does not replace FollowUp.
Can I use both FollowUp and OpenPhone?
Yes: many sales teams do. OpenPhone handles the team's shared business line for inbound calls and conversational SMS. FollowUp handles each rep's outbound SMS follow-up cadences from their personal iPhone number. The two coexist without overlap if you scope them this way.
Does OpenPhone do SMS automation?
OpenPhone has auto-replies, snippets, and basic scheduled messages, useful for conversational SMS, not for multi-step follow-up cadences with reply classification. FollowUp is built around cadences and AI reply triage.
Does FollowUp give me a business phone number?
On the Business tier, FollowUp provisions a dedicated Twilio business number (A2P 10DLC registered). On the Pro tier, texts go through iMessage from your own iPhone number; there is no separate business line. If a separate business line is the requirement, OpenPhone is built for that.
Which is cheaper?
FollowUp's free tier covers basic follow-up at no cost. OpenPhone's entry tier is paid (per-user). For a single rep doing SMS follow-up, FollowUp is cheaper. For a team that also needs a shared business phone line with call routing, the comparison is not apples-to-apples.

Try FollowUp free

Free tier includes 3 SMS blasts per day with up to 10 recipients each. No credit card required.

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Last verified: May 10, 2026. Pricing and feature claims are checked against each vendor's public pricing page on this date. Pricing changes; verify current rates on the vendor sites linked above before making a purchase decision.

FollowUp publishes these comparisons because users are asking AI search engines for honest information about sales tools. We aim for fair, factual descriptions of the alternatives and clear guidance on when each fits best.