Bolna vs Synthflow (2026): which should you pick?

Pick Bolna if

• Fits if you want voice agents that speak Indian languages
• Works for teams running bulk outbound call campaigns

Look elsewhere if

• Watch out: telephony and a platform fee are added to the 6 cent per minute rate
• Tight if you forget top-ups: agents stop making calls when credits run out
• Watch out: Pilot plan rates hold only until the purchased minutes are used, then standard prices apply
• Skip it if you want a monthly flat fee, as billing is by the minute

Pick Synthflow if

• Fits if you want white-label voice agents under one annual contract
• Makes sense if you use Five9, Salesforce or HubSpot

Look elsewhere if

• Not for you if you want to try it, as the page says no free plan and no trial
• Skip it if you are a small business, since every deployment starts on an Enterprise contract
• Not for you if you want per-minute pricing, because the page says there is none
• Watch out: HIPAA is self-attested in the vendor's own Trust Center summary

Bolna

• Pay-as-you-go lists 6¢ per minute with bundled models; telephony and a platform fee are added per minute, and the Pilot plan has fixed minutes.
• Agents stop making calls when credits run out unless automatic top-ups are set.
• Pilot plan rates hold only until the purchased minutes are used, then the account reverts to standard pricing.

Synthflow

• No prices are published. The pricing page says it is an annual enterprise agreement with no free plan, no trial and no per-minute rate.
• Every new deployment starts on an Enterprise contract, so it is not set up for self-serve small-business use.
• HIPAA is listed as self-attested in the vendor's own Trust Center summary.

Bolna

No-code agent builder and API

Agents are built from a template or from scratch in a dashboard, and calls can also be triggered through a REST API with Python, JavaScript or cURL examples.

Indian-language voice

The site says agents work across 10+ vernacular Indian languages including Hinglish, Hindi, Tamil and Telugu, and lists 20+ languages overall.

Bulk campaigns

Outbound campaigns can run thousands of AI calls at once, for uses such as reminders, lead qualification and announcements.

Live API calls and human handoff

An agent can call external APIs mid-conversation and transfer the call to a human agent when needed.

Model choice

The site lists 20+ speech-to-text, language and text-to-speech models, and says you can bring your own API keys to cut costs.

Synthflow

Voice agents for calls

Agents handle customer service, reception, answering service, concierge, appointment booking and IVR use cases over the phone.

Telephony options

The contract can use Synthflow Native Telephony, SIP trunking or approved enterprise telephony, with routing, escalation and fallback logic.

White label

BPOs and software platforms can run it under their own brand, with a workspace per client and one analytics dashboard across them.

Launch support

Where the agreement includes it, Synthflow's forward-deployed engineers implement, test and launch agents with your team. Deployments go live in weeks.

Security and compliance

The Trust Center lists SOC 2 Type 2, ISO 27001, GDPR, HIPAA (self-attested) and PCI DSS v4.0.1, with ISO 42001, DORA and the EU AI Act in progress.

Bolna

• Pay-as-you-go$10

  minimum credit top-up, used as you go

  Credits from $10 to $5,000, billed by usage. Standard rate starts at 6¢ per minute and falls to about 4.5¢ at larger top-ups.

• Pilots$300

  one-time, for 6,500 minutes

  Fixed per-minute rate (about 4.6¢), up to 25 concurrent calls, WhatsApp support and four 1:1 calls. A $500 tier gives 12,000 minutes.

• EnterpriseCustom

  Custom volume pricing, customised integrations and deployment, priority support and a dedicated account manager.

Synthflow

Pricing could not be confirmed. See synthflow.ai.