If you're shopping outbound dialers, Koncert is probably on your list — and for good reason. Its parallel/multi-line dialing is the thing it's known for: dial several numbers at once, let the system drop the dead air and bad connects, and route a live human to a rep. For a high-volume SDR team grinding cold lists, that's a real productivity lever.
Full disclosure: I work for ReadySMS, so read this knowing where I sit. I'm not going to pretend Koncert is bad — it isn't, and for a certain kind of buyer it's a clean fit. What I want to do here is draw the line honestly between "you need an AI sales dialer platform" and "you need cheap registered SMS plus a solid power dialer plus 10DLC handled for you," because those are two different purchases that often get conflated.
Where Koncert is genuinely strong
Let me give Koncert its due before I argue the other side.
- Parallel / multi-line dialing. This is the headline. If your motion is dial as many numbers as possible per hour — think outbound SDR teams burning through cold lists — multi-line connect rates are hard to beat. A single-line dialer can't match the raw throughput.
- Cadence and sales-engagement features. Koncert plays in the sales-engagement category, so it leans into sequences, rep coaching, and analytics built for managers watching connect-to-conversation ratios.
- AI-assisted dialing. Features that filter voicemails and dead air so reps spend more seconds on live conversations.
If you're a 20-rep SDR org and your whole world is connect rate per hour, that category is built for you. Confirm Koncert's current plans and pricing on their own site — sales-engagement tools tend to price per seat and the numbers move, so I won't quote figures I can't stand behind.
The catch: that category is expensive, it's optimized around voice, and SMS — if it exists at all — is usually a thin afterthought bolted onto a calling product. That's the gap.
Where ReadySMS fits instead
ReadySMS comes at outbound from the other direction. We're a messaging platform first, with a real power dialer attached and 10DLC compliance handled in-app. So if your outbound is SMS-led with calling as backup — or you just want both without paying sales-engagement-suite prices — the math shifts.
Here's the honest framing:
| Koncert (category) | ReadySMS | |
|---|---|---|
| Primary strength | Parallel multi-line voice dialing | Cheap registered SMS + power dialer |
| SMS | Usually secondary | Core product, transparent per-segment pricing |
| 10DLC registration | Confirm on their site | Done-for-you in-app |
| Native GoHighLevel | Not the focus | OAuth, two-way, per-sub-account |
| Free to try | Confirm | free test sends + $25 credit at registration |
| Pricing shape | Per-seat sales-engagement | Prepaid credits + per-agent dialer |
ReadySMS won't out-dial a dedicated parallel dialer on pure call volume. If you need to fire four lines simultaneously across a cold list all day, that's not our pitch. Our pitch is everything around and after the call: the text that lands before you dial, the follow-up sequence, the inbound replies in one inbox, and a per-agent dialer that doesn't carry a sales-engagement price tag.
The SMS cost difference, with real math
This is where the gap gets concrete. ReadySMS pricing is per outbound segment plus a transparent $0.0045/segment carrier pass-through (itemized, not marked up):
- Starter (0–50k/mo): $0.0155 + $0.0045 = $0.0200/segment
- Growth (50k–500k): $0.0125 + $0.0045 = $0.0170/segment
- Enterprise (500k+): $0.0028 + $0.0045 = $0.0073/segment
A worked example. Say you run a speed-to-lead text on every new lead — 8,000 leads a month, one 150-character message each (one segment):
8,000 × 1 × $0.0200 = $160/month on the Starter tier.
Add an emoji and a longer message — 175 unicode characters splits into 3 segments at 67 chars each:
8,000 × 3 × $0.0200 = $480/month.
That's the difference a single emoji makes — which is exactly why I'd skip it for transactional speed-to-lead texts. (More on trimming that bill in reducing SMS costs.) Sales-engagement platforms that bundle SMS rarely expose the carrier pass-through this cleanly, and at volume the per-segment rate drops as low as $0.0073 all-in (at 500k+ segments/mo).
The power dialer you actually get
ReadySMS includes outbound voice — manual and queue dial, call recording, voicemail drop, transfer/barge/whisper, auto-text, and speed-to-lead auto-dial on new leads. Plans are per agent, minutes billed in 6-second increments:
- Free — $0/mo, 1 agent, 1 number, 500 minutes included, then $0.06/min
- Pro — $29/agent/mo, up to 3 agents, $0.05/min
- Team — $69/agent/mo, unlimited agents, $0.0375/min, speed-to-lead, lead routing, manager monitoring
Cost-per-connect math: at $0.0375/min on Team, a 4-minute live conversation costs $0.15 in talk time. Even at a 1-in-5 connect rate, dialing five numbers to land one conversation runs you well under a dollar in minutes. That's not parallel dialing — it's single-line — but for a team whose first touch is a text, the dialer is the follow-up tool, not the engine.
The pairing that matters: text lands instantly when a lead comes in, and the Team plan auto-dials the same lead inside the first five minutes. That first-five-minutes window is the single biggest predictor of whether a fresh lead converts — and you get both halves in one platform instead of stitching a dialer to a separate SMS tool.
If pure power-dialing is your priority, our PhoneBurner comparison and Dialpad comparison are more head-to-head on the calling side.
Compliance: done-for-you 10DLC, not a to-do list
Sales-engagement platforms vary wildly on how much 10DLC they actually handle. Some make it your problem. ReadySMS does it in-app:
- Brand + campaign registration handled for you — roughly ~$10/mo per brand, ~$20/mo per campaign in carrier fees, approval typically 1–3 days. Unregistered traffic gets carrier-filtered, so this is the difference between texts arriving and silently disappearing.
- Automatic STOP handling — opt-outs propagate so a contact can't be re-messaged across campaigns.
- Quiet-hours enforcement — sends held outside permitted local hours, which reduces TCPA exposure.
- Litigator / DNC scrubbing — known TCPA-litigator and DNC numbers screened before send.
That last one is worth a separate note for cold-leaning outbound. Our standalone TCPA & DNC litigator scrub runs $0.005 per contact — pay only for what you scrub. Against the $500–$1,500-per-text exposure a single litigator can create, scrubbing a 10,000-record list for $50 is cheap insurance. To be clear: none of this makes you lawsuit-proof. Compliance is ultimately the sender's responsibility. These features reduce risk and build an audit trail; they don't eliminate it.
If you want the full breakdown of how 10DLC works and why it matters, start here.
Native GoHighLevel — if that's your stack
A lot of outbound teams run on GoHighLevel, and this is where the two products diverge most. ReadySMS has a native OAuth integration with GHL: two-way sync of inbound and outbound, mapped per location/sub-account so agencies keep clients isolated. Inbound replies land in the conversations inbox and in GHL.
Sales-engagement dialers generally aren't built for GHL's sub-account model, so if you're an agency or a GHL-native team, that's a structural advantage rather than a feature checkbox. Setup is walked through in our GHL SMS setup guide.
Who should pick which
Honest version:
Stay with (or buy) Koncert if:
- Your outbound is voice-first and high-volume — parallel/multi-line dialing is the core need
- You have a large SDR team and managers who live in cadence + coaching analytics
- SMS is a nice-to-have, not the spine of your motion
Pick ReadySMS if:
- Your outbound is SMS-led, or you want both SMS and calling without a per-seat sales-engagement bill
- You want registered SMS with transparent per-segment pricing and an itemized carrier pass-through
- You run on GoHighLevel and want native two-way sync
- You'd rather have 10DLC, STOP handling, quiet hours, and DNC scrubbing built in than assemble them
The practical takeaway
These aren't the same product wearing different logos. Koncert is a voice-throughput machine for teams whose KPI is connects per hour. ReadySMS is cheap, compliant, registered SMS with a capable power dialer attached — built especially well for GHL teams. If your real bottleneck is the text and the follow-up, not raw dial volume, the cheaper, more legible bill is on our side.
Easiest way to know: use the free test sends to see delivery for yourself, then put the $25 credit you get at registration toward a real speed-to-lead sequence and watch what one segment actually costs you. Run your own numbers on the cost calculator, or compare tiers on the pricing page. And do confirm Koncert's current features and pricing on their own site before you decide — categories move fast, and you should buy on today's facts, not mine.