Synthflow alternatives
Synthflow Alternatives: 6 Options With Published Pricing (2026)
Competitor prices verified on October 25, 2026. Page updated October 25, 2026.
What are the best Synthflow alternatives?
Synthflow's pricing page now lists only enterprise contracts starting at $30,000 a year, so most teams that used its monthly plans need a new home. The nearest no-code and low-code replacements with published prices are Retell AI, Vapi, Bland AI and ElevenLabs Agents, all hosted voice agents billed per minute or per plan. SignalWire runs an AI agent on its own carrier network. AgentLine is the option for people who already run an agent in Claude Code, Cursor, OpenClaw, Hermes or Codex and need a phone number: $3.00 a month per additional number and $0.12 a minute, no contract.
On the verification date, Synthflow's pricing page carried one figure: enterprise contracts start at $30,000 annually, with final pricing set by call volume, concurrency, telephony, integrations, security review and launch support. No per-minute rate, included minutes, number price or free trial is published. Third-party reviews describe earlier self-serve plans from about $29 a month; those are not on Synthflow's page today, and this page does not quote them.
That is the most likely reason searches for Synthflow alternatives multiplied in August and September 2026. A no-code builder that moves to a $2,500 a month floor leaves small businesses, agencies and solo builders looking for something they can start today. Every alternative below has a price you can read on the vendor's site, and the cost examples work the bill at 300 and 1,000 minutes.
The alternatives
01Retell AI
$0.07 to $0.31 a minute all-in, $3.00 a month per additional number, $10 free credit
Retell is the closest match for a Synthflow user who liked a visual flow builder but wants published prices. The conversation flow editor is no-code, every model and voice has a per-minute rate on the pricing page, and billing is per second. Retell's example stack is $0.11 a minute before $0.015 a minute telephony on a Retell number.
Best for: Agencies and SMBs who want a flow builder with a visible rate card.
02Vapi
$0.05 a minute hosting plus providers at cost, about $0.08 to $0.13 a minute; $5 free credit
Vapi is more developer-shaped than Synthflow, but the dashboard can build an assistant without code and the free package includes a phone number. Core is $29 a month with five numbers. The cost is split across hosting, transcriber, model and voice, which Vapi's calculator estimates at $82 to $129 for 1,000 minutes.
Best for: Builders who want control over each component and are fine with several meters.
03Bland AI
$0.14 a minute on Start with no platform fee; $0.12 a minute plus $299 a month on Build
Bland's Start plan needs no card and includes two credits and an inbound number. The talk-time rate includes the model and voice, with telephony billed at pass-through cost and SMS only on Enterprise. The pathway builder is visual. Bland is strongest for outbound volume.
Best for: Outbound teams who want a single talk-time rate and a pathway builder.
04ElevenLabs Agents
Free plan with 15 minutes; paid plans from $6 a month; $0.08 a minute overage; LLM billed separately
ElevenLabs is the plan-based option. Creator is $22 a month for 275 minutes, Pro is $99 for 1,238 minutes, and telephony is included. The agent builder is no-code and the voices are ElevenLabs' own. For a Synthflow user at a few hundred minutes a month this is the lowest fixed bill on the page.
Best for: Small teams who want a monthly plan and top-tier voices.
05SignalWire AI Agent
$0.16 a minute AI agent plus carrier minutes from $0.0066; numbers $0.50 a month
SignalWire hosts the agent on its own network, which removes the separate telephony vendor. Numbers are $0.50 a month and SMS is under half a cent a segment. The $0.16 a minute includes standard text to speech. Building is through the Agents SDK or SWML, so it is low-code rather than no-code.
Best for: Teams who want agent and carrier in one bill with very cheap numbers.
06AgentLine
plans from $20 a month with included numbers, minutes and SMS; beyond the plan $0.12 a minute all-in, $3.00 a month per US or Canada number, $0.02 per SMS
AgentLine is for people who already have an agent. Claude Code, Cursor, OpenClaw, Hermes, Codex or a custom loop installs the skill file or MCP server, buys a number, and the hosted phone agent runs calls from the prompt your agent wrote. There is no builder to learn and nothing to host; the agent you already talk to does the configuring. Templates for receptionists, scheduling and reminders are ready to clone.
Best for: Anyone with an existing agent who wants it on a phone number in minutes.
Synthflow alternatives compared
Prices as shown on each vendor's pricing page on October 25, 2026. AgentLine prices are current.
| Tool | Per-minute price | Number price | Setup time | Hosted agent or bring your own | SMS | MCP / skill support | Free tier | Contract |
|---|---|---|---|---|---|---|---|---|
| Synthflow | Not published. Enterprise contracts start at $30,000 a year | Not published | Days, with onboarding from Synthflow | Hosted agent (no-code) | Not published | Not published | None listed | Annual enterprise contract |
| Retell AI | $0.07 to $0.31/min all-in (voice infra $0.055 plus LLM, TTS and $0.015 telephony) | $2.00/month for a Retell number | Hours to build an agent and a conversation flow | Hosted agent | $0.01/message with a $20/month SMS add-on | Retell MCP server; MCP node for agent tools | $10 free credits | None; enterprise is custom |
| Vapi | $0.05/min hosting, plus transcriber, model and voice at provider cost (Vapi's own estimate: $0.08 to $0.13/min) | 1 Vapi number on the free package, 5 on Core ($29/month) | Hours to configure an assistant, tools and telephony | Hosted agent | Not listed on the pricing page | Vapi MCP server; MCP tools inside assistants | $5 free credits | None on the free package; Pro has a $999/month minimum |
| Bland AI | $0.14/min on Start, $0.12/min on Build, plus telephony at pass-through cost | One inbound number included on Start (listed as a $15/month value) | Hours to days to build a conversational pathway | Hosted agent | Enterprise plan only | Bland MCP server | 2 credits, no card required | None on Start; Build is $299/month; Enterprise is contracted |
| ElevenLabs Agents | Plan minutes, then $0.08/min overage. LLM billed separately | Telephony included on every plan; bring Twilio or SIP at cost | Under an hour for a basic agent | Hosted agent | $0.003/message | External MCP servers as agent tools | Free plan with 15 minutes | Monthly plans from $6 to $990 |
| SignalWire AI Agent | $0.16/min AI agent plus $0.0066/min inbound or $0.008/min outbound | $0.50/month local, $0.80/month toll-free | Hours with the Agents SDK | Hosted agent runtime on a carrier | $0.00415/segment local | Agents SDK connects to MCP servers and can expose one | Trial credit on signup | None |
| AgentLine | $0.12/min beyond the plan allowance, all-in, per second after a one-minute minimum | $3.00/month beyond the plan, US or Canada | About 2 minutes from one skill file or the MCP server | Bring your own agent | SMS $0.02/message in either direction on the same number | MCP server, skill file, REST | Plans from $20 a month with numbers, minutes and SMS included. | None |
What a month costs
300 minutes a month
One number, 300 connected minutes. Synthflow's figure is the published contract floor divided by twelve, before any usage.
| Tool | Arithmetic | Monthly total |
|---|---|---|
| Synthflow | Enterprise contracts start at $30,000 a year, which is $2,500 a month before usage | $2,500.00 a month minimum |
| Retell AI | Retell's example stack is $0.11/min (LLM $0.04, voice infra $0.055, TTS $0.015). Add $0.015/min telephony on a Retell number: 300 × $0.125 = $37.50, plus a $2.00 number | $39.50 |
| Vapi | 300 × $0.05 hosting = $15.00, plus 300 × $0.03 to $0.08 for transcriber, model and voice = $9.00 to $24.00. Free package, one number included | $24.00 to $39.00 |
| Bland AI (Start) | 300 × $0.14 = $42.00, plus telephony at pass-through cost | $42.00 plus telephony |
| ElevenLabs Agents | Creator plan $22 includes 275 minutes. 25 extra × $0.08 = $2.00. LLM usage is billed on top | $24.00 plus LLM |
| SignalWire AI Agent | 300 × $0.16 = $48.00, plus 300 × $0.0066 inbound = $1.98, plus a $0.50 number | $50.48 |
| AgentLine | Individual plan $20 includes one US/CA number and 100 minutes. 200 extra × $0.12 = $24.00 | $44.00 |
1,000 minutes a month
Every self-serve option on this page costs under $200 a month at 1,000 minutes. The gap to Synthflow's floor is more than ten to one.
| Tool | Arithmetic | Monthly total |
|---|---|---|
| Synthflow | Enterprise contracts start at $30,000 a year, which is $2,500 a month before usage | $2,500.00 a month minimum |
| Retell AI | 1,000 × $0.125 = $125.00, plus a $2.00 number | $127.00 |
| Vapi | Vapi's own estimate: $50 hosting, $10 transcriber, $8 to $45 model, $15 to $24 voice | $83.00 to $129.00 |
| Bland AI (Start or Build) | Start: 1,000 × $0.14 = $140.00. Build: $299 platform fee plus 1,000 × $0.12 = $419.00. Telephony is extra on both | $140.00 or $419.00 plus telephony |
| ElevenLabs Agents | Pro plan $99 includes 1,238 minutes. LLM usage is billed on top | $99.00 plus LLM |
| SignalWire AI Agent | 1,000 × $0.16 = $160.00, plus 1,000 × $0.0066 = $6.60, plus a $0.50 number | $167.10 |
| AgentLine | Individual plan $20 includes one number and 100 minutes. 900 extra × $0.12 = $108.00 (Startup at $200 includes all 1,000 minutes and 12 numbers) | $128.00 |
Verdict
Pick Synthflow if
- You are an enterprise deploying at scale and want onboarding, security review and launch support under one contract.
- A $30,000 a year floor is small next to the call volume you run.
- You want a managed partner rather than a self-serve product.
Pick AgentLine if
- You already run an agent in Claude Code, Cursor, OpenClaw, Hermes, Codex or your own loop and want it to make and answer calls.
- You want to start today with no contract: $3.00 a month per additional number and $0.12 a minute.
- You want a receptionist, scheduler or reminder agent from a template, with SMS on the same number.
What Synthflow's pricing page says now
The page lists Enterprise only. The text reads that enterprise contracts start at $30,000 annually, and that final pricing depends on call volume, concurrency, telephony setup, integrations, security needs and launch support. The contract covers Synthflow native telephony or SIP trunking, custom concurrency planning, CRM and calendar integrations, MSA and DPA support, and implementation and training.
Nothing on the page states a per-minute rate, included minutes, a phone number price, SMS pricing or a free trial. If you see those numbers elsewhere, they come from older plans or third-party estimates.
No-code builder or an agent you already have
Synthflow's appeal was building a voice agent without code. Retell, Bland and ElevenLabs keep that model with visual builders and published prices. Vapi and SignalWire lean toward developers but still work without a backend.
AgentLine replaces the builder with the agent you already use. You tell Claude Code or OpenClaw what the phone agent should do, it writes the system prompt, buys the number and places the call through the MCP server or skill. For calls that need live data, the persistent relay or a webhook streams each turn to the runtime. If you do not have an agent yet, the templates give you a working receptionist or scheduler to start from.
Switching cost
A Synthflow flow rebuilds as a Retell conversation flow, a Bland pathway or an ElevenLabs agent in roughly a day for a simple agent. Numbers on Synthflow native telephony cannot be ported in the usual sense, so plan to provision new ones and update any published numbers.
On AgentLine the setup is a skill install, an API key, a number purchase and a test call. The after-hours receptionist and healthcare booking templates cover the two most common Synthflow use cases and are linked below.
FAQ
What are the best Synthflow alternatives?
Synthflow's pricing page now lists only enterprise contracts starting at $30,000 a year, so most teams that used its monthly plans need a new home. The nearest no-code and low-code replacements with published prices are Retell AI, Vapi, Bland AI and ElevenLabs Agents, all hosted voice agents billed per minute or per plan. SignalWire runs an AI agent on its own carrier network. AgentLine is the option for people who already run an agent in Claude Code, Cursor, OpenClaw, Hermes or Codex and need a phone number: $3.00 a month per additional number and $0.12 a minute, no contract.
How much does Synthflow cost?
On its pricing page, Synthflow lists only enterprise contracts starting at $30,000 a year. Per-minute rates, included minutes and number prices are not published. Earlier self-serve plans reported by third parties are not shown on the page.
Is there a free Synthflow alternative?
ElevenLabs Agents has a free plan with 15 minutes a month. Vapi gives $5 of credit and Retell $10. Bland's Start plan needs no card and includes two credits. AgentLine starts at $20 a month with a number and minutes included, then bills $3.00 a number and $0.12 a minute beyond the plan of calls.
Which Synthflow alternative is no-code?
Retell, Bland and ElevenLabs all have visual builders. Vapi's dashboard works without code for simple assistants. AgentLine is configured by the agent you already run, so there is no builder to learn; you describe the phone agent in plain language and the agent sets it up.
Can AgentLine replace a Synthflow receptionist?
Yes, for inbound answering, scheduling and reminders. Clone the after-hours receptionist or healthcare booking template, attach a US or Canada number at $3.00 a month beyond your plan, and the hosted phone agent answers from the prompt. Calendar or CRM lookups during a call go through the persistent relay or a webhook to your runtime.
Why did searches for Synthflow alternatives jump in 2026?
The visible change is the pricing page: it now lists only enterprise contracts from $30,000 a year. Teams on the earlier monthly plans are looking for a self-serve replacement, which is what this page lists.
Set it up on your agent
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AgentLine is not affiliated with any company named on this page. Competitor prices were read from each company's public pricing page on the date shown and can change without notice. Found a price that has changed? Email support@agentline.cloud.