Side by side

Plivo Voice API vs SIP.IO

Both stand on voice apis. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Plivo Voice API

Free trial AndroidAPIiPhone+1

Plivo Voice API combines call handling, recording, and streaming audio with developer SDKs and integrations. Check route-specific rates and billing increments against expected call patterns before choosing a plan.

Visit Plivo Voice API

SIP.IO

Free plan APIWeb

SIP.IO combines programmable voice and contact center features, with options for messaging, recording, and AI-assisted calls. The Free tier supports testing, while current usage pricing requires contacting the company; HIPAA is not offered.

Visit SIP.IO

The facts

	Plivo Voice API	SIP.IO
Free plan	A free trial	Yes
Open source	Not published	Not published
Runs on	Android, API, iPhone, Web	API, Web
Lowest paid plan	Enterprise: $1,000 a month	Free or on request
Plans published	3	2
Maker	Not published	Not published
Website	plivo.com	sip.io
On voice apis	#10 of 52	#6 of 52

Plivo Voice API: what it does well

Supports PSTN, SIP, and WebRTC calls.
Offers SDKs in seven listed languages.
Audio streams are available over WebSocket.
$10 in credits requires no credit card.
Lists SOC 2, HIPAA/HITECH, PCI DSS, and GDPR compliance.

What to know first

No free plan is listed.
Calls use 60-second billing increments.
Call routes and features have separate rates.
Listed concurrency limit is 50 calls.

SIP.IO: what it does well

Free tier includes a test phone number and call-flow access.
Browser softphone supports WebRTC calling inside an app.
Call recordings can pause and resume mid-call.
Voice AI agents can escalate to people.
SIP.IO says it is ISO/IEC 27001 certified.

What to know first

Current usage-based prices require contacting SIP.IO.
Published voice and number rates are examples only.
HIPAA is not offered and there is no BAA program.
SOC 2 Type II has not been audited.

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