If you're shopping for a virtual phone system with an outbound dialer, CallHippo is probably on your shortlist. It's a solid, well-known VoIP product — international numbers, a power dialer, call analytics, the usual stack a sales or support team expects from a cloud phone.
But a lot of people land on CallHippo because they need two things: outbound calling and outbound texting. And that second piece — SMS at real volume, on compliant routes, without surprise costs — is where a phone-first tool and a messaging-first tool start to diverge.
Full disclosure: I work for ReadySMS, so read this with that in mind. I've tried to keep the comparison honest, including where CallHippo is genuinely the better pick. I'm not going to quote CallHippo's prices, because they change and tier rules get complicated — check their site for current numbers. What I can do is be specific about how the two products are shaped differently and show you the math on ours.
Where CallHippo is genuinely strong
Let me start with what CallHippo does well, because if these are your priorities, it may be the right tool and you can stop reading.
- International phone numbers. CallHippo's bread and butter is virtual numbers across a lot of countries. If your team is dialing the UK, India, the Philippines, Australia — multiple regions — a global VoIP provider is built for exactly that.
- It's a full phone system. Call queues, IVR, business-hours routing, voicemail, call analytics dashboards. If you want a polished inbound + outbound phone experience for a distributed team, that's the category it competes in.
- Established VoIP feature depth. Years of iteration on call quality, integrations, and admin controls.
If your primary job-to-be-done is "replace our office phones and give the sales team a dialer," CallHippo and its peers are legitimate. SMS, in that world, tends to be a secondary feature bolted onto a phone product.
That's the dividing line. ReadySMS is a messaging platform first, with a dialer attached — not a phone system that also texts. Which way you should lean depends entirely on your volume mix.
Where ReadySMS wins: cheap registered SMS at real volume
The thing phone-first tools rarely optimize for is per-segment SMS cost at scale. Texting is a line item, not the product, so the per-message price tends to sit higher than a messaging-native platform would charge.
Here's where ReadySMS lands. Per outbound segment, plus a flat $0.0045/segment carrier pass-through that's billed separately so the invoice is actually legible:
| Monthly volume | Per segment | + carrier | All-in |
|---|---|---|---|
| 0–50,000 (Starter) | $0.0155 | $0.0045 | $0.0200 |
| 50,000–500,000 (Growth) | $0.0125 | $0.0045 | $0.0170 |
| 500,000+ (Enterprise) | $0.0028 | $0.0045 | $0.0073 |
Roughly two cents per message on the Starter tier, dropping to sub-penny send rates at Enterprise volume (500K+/mo).
Worked example
Say you've got a 5,000-contact list and you send a 175-character promo with one emoji. The emoji forces unicode encoding, which drops the per-segment limit to 70 characters — so 175 chars splits into 3 segments.
On the Starter tier:
`` 5,000 contacts × 3 segments × ($0.0155 + $0.0045) = 15,000 segments × $0.0200 = $300.00 ``
Drop the emoji and tighten the copy under 160 GSM-7 characters and it's a single segment:
`` 5,000 × 1 × $0.0200 = $100.00 ``
Same campaign, three times the cost, decided entirely by one emoji. That's the kind of thing a messaging-native tool makes visible — and one reason we built a cost calculator so you can model it before you send.
The built-in power dialer
You don't have to give up calling to get cheaper texting. ReadySMS has an outbound voice dialer built in: queue and manual dial, call recording, voicemail drop, transfer / barge / whisper, and auto-text after a call.
Plans are per agent, minutes billed in 6-second increments:
| Plan | Price | Minutes | Per-min after |
|---|---|---|---|
| Free | $0/mo, 1 agent | 500 included | $0.06 |
| Pro | $29/agent/mo, up to 3 agents | — | $0.05 |
| Team | $69/agent/mo, unlimited agents | — | $0.0375 |
The Team plan adds speed-to-lead auto-dial — a new lead comes in and gets called automatically. Pair that with an instant SMS and you're hitting fresh leads inside the first few minutes, which is the window where contact rates are dramatically higher. Full add-on details live on the pricing page.
The point isn't that this dialer out-features a dedicated VoIP suite — it doesn't try to be your whole phone system. It's that for a team whose real workload is outbound sales and texting, you get both in one place without buying a full phone platform per seat.
Done-for-you 10DLC (the part people underestimate)
If you're sending application-to-person SMS to US numbers, you need A2P 10DLC registration — a registered brand and campaign. Unregistered traffic gets carrier-filtered, meaning your texts quietly don't arrive. This trips up a lot of teams who buy a phone tool, start texting, and wonder why delivery is bad.
ReadySMS handles registration in-app: brand plus campaign, $35 one-time with a new number ($30 if you keep an existing one), then roughly ~$35/mo total in carrier fees (brand $10 + campaign $20 + number $5) after approval, which usually takes 4–7 business days. If you've never touched this before, the 10DLC explainer walks through it.
On top of registration, the compliance stack runs on every send:
- Automatic STOP/opt-out handling — an opt-out propagates so that contact can't be messaged again across campaigns.
- Quiet-hours enforcement — sends held outside permitted local hours based on the recipient's area, which reduces TCPA exposure.
- Litigator / DNC scrubbing — known TCPA-litigator and DNC numbers can be screened before send. There's also a standalone scrub at $0.005 per contact if you want to clean a list you bought elsewhere.
- Consent attestation capture — an audit trail for bulk and API sends.
None of this makes you lawsuit-proof — compliance is ultimately the sender's responsibility — but at $500–$1,500 of potential TCPA exposure per text, screening a list for half a cent a number is cheap insurance.
Native GoHighLevel integration
If you run on GoHighLevel — and a lot of agencies and local businesses do — this is the deciding factor. ReadySMS connects via OAuth with two-way sync: inbound and outbound messages flow both directions, mapped per location / sub-account so agencies keep clients isolated.
That's a meaningfully different relationship than a VoIP tool that offers a generic webhook or Zapier hop. Setup details are in the GHL setup guide. If GHL isn't in your stack, ReadySMS still works fine on its own — conversations inbox, bulk campaigns, templates, and an API — it's just that the GHL integration is the deepest one we ship.
Quick decision guide
Pick CallHippo if:
- You need international numbers across many countries.
- Inbound phone — IVR, queues, call routing — is a core requirement.
- SMS is a minor convenience feature, not a volume channel.
Pick ReadySMS if:
- SMS is a real channel and per-segment cost matters at volume.
- You want a dialer and texting without paying for a full phone platform per seat.
- You're on GoHighLevel and want true two-way sync.
- You'd rather have 10DLC and opt-out compliance handled in-app than figure it out yourself.
It's genuinely possible the right answer is "both" — a VoIP system for your phones and ReadySMS for messaging at volume. We're not trying to replace a full international phone system. We're trying to be the better home for your texting and outbound dialing.
The practical takeaway
CallHippo is a capable VoIP product, strongest when international calling and inbound phone features are your center of gravity. ReadySMS is built the other way around: messaging-first, with cheap registered SMS (2¢/segment all-in to start, sub-penny at 500K+/mo scale), a built-in power dialer, done-for-you 10DLC, and native GoHighLevel sync.
The cleanest way to compare isn't reading more comparisons — it's sending. You get 20 free test sends, plus a $25 credit when you submit 10DLC registration — enough to register a campaign and run a real test against whatever you're using today, pay-as-you-go with no monthly platform fee. Watch your delivery, check the invoice, and decide with your own numbers.
Start with the pricing page or model your volume in the calculator. If you're weighing a few options, the Aircall and CloudTalk comparisons cover similar dialer-plus-SMS tradeoffs from a different angle.