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Flowroute
What Flowroute is
Flowroute provides cloud-based SIP trunking, voice and messaging APIs, phone numbers, faxing, and call forwarding. Businesses can connect existing PBX systems or telephone adapters for inbound and outbound calls. Its patented HyperNetwork dynamically routes inbound DID numbers to support continuity. Messaging APIs handle SMS and MMS, with webhook routing and message detail records. The Numbers API searches for and purchases US and Canadian numbers, manages inbound routes, and automates E911 and CNAM setup. Flowroute identifies FreeSWITCH as a certified service-provider integration. Account controls include IP-based outbound authentication, maximum outbound rate limits, and destination blacklists and whitelists. Usage is metered and pay-as-you-go: domestic inbound starts at $0.005 per minute, while US lower 48 and Canada outbound starts at $0.00833 per minute. SMS and MMS can have additional fees and surcharges, and outbound rates vary by country. Free, non-tiered support is available.
Who it suits
Flowroute suits businesses, developers, CPaaS providers, dealers, partners, and contact centers needing programmable voice, messaging, and number services. It also fits teams connecting existing PBX equipment or FreeSWITCH systems.
What it does well
- SIP trunking, voice, messaging, fax, and forwarding
- HyperNetwork routing for inbound continuity
- Numbers API with E911 and CNAM automation
- Fraud controls and destination lists
- Free non-tiered support
What to know first
- Paid metered usage with varying rates
- SMS and MMS may incur extra fees
- Outbound rates vary by country
- No free plan
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| CNAM lookup | per lookup · CNAM storage is free | Free |
| Long-code SMS | metered · Inbound and outbound · additional fees and surcharges apply | Free |
| US/Canada outbound calling | metered · US lower 48 and Canada outbound | $0.01 a month |
| Toll-free SMS | metered · Inbound and outbound · additional fees and surcharges apply | $0.01 a month |
| Toll-free calling | metered · US and Canada inbound · $0.00530 dip charge per call | $0.01 a month |
| Domestic inbound calling | metered · US domestic inbound · no simultaneous-call limit | $0.01 a month |
| Long-code MMS | metered · Inbound and outbound · additional fees and surcharges apply | $0.01 a month |
| Toll-free MMS | metered · Inbound and outbound · additional fees and surcharges apply | $0.02 a month |
The first 8 of 11 plans, as flowroute.com lists them, read 15 Oct 2026. The maker's own page has the final word. Every plan
Verdict
Flowroute combines telephony infrastructure, APIs, number management, routing, and fraud controls for communications operations. Pay-as-you-go billing and service-specific surcharges should be considered before deployment.
Facts from Flowroute's own pages
- API authentication
- The Messaging API uses HTTP Basic Authentication with an access key as username and secret key as password. · developer.flowroute.com, 15 Oct 2026
- Calling
- The service connects existing PBX systems or telephone adapters for inbound and outbound calls. · flowroute.com, 30 Sept 2026
- Company profile
- LinkedIn lists Flowroute as a privately held BCM One company with 501–1,000 employees, New York headquarters and a 2007 founding year. · linkedin.com, 15 Oct 2026
- Developer documentation
- Documentation includes API references, articles, quickstarts, Docker repositories and use-case guides for masking, two-factor authentication and appointment reminders. · developer.flowroute.com, 15 Oct 2026
- Faxing
- Flowroute offers T.38 fax routes for sending and receiving faxes remotely. · flowroute.com, 15 Oct 2026
- Founded
- 2007 · flowroute.com, 28 Sept 2026
- Fraud protection
- Account controls include IP-based outbound authentication, maximum outbound rate limits, and destination blacklists and whitelists. · flowroute.com, 30 Sept 2026
- Free account
- Flowroute says users can create a free Manage portal account for service ordering, number porting, and service management. · flowroute.com, 30 Sept 2026
- Headquarters
- Seattle, Washington, United States · flowroute.com, 28 Sept 2026
- HyperNetwork
- Its patented HyperNetwork dynamically changes inbound DID routing to alternate carriers to provide failover and redundancy. · flowroute.com, 15 Oct 2026
- Integrations
- The FAQ lists integrations with 3CX, Asterisk and FreeSWITCH, and describes the APIs as software-agnostic. · flowroute.com, 15 Oct 2026
- Intended users
- Flowroute describes its platform as suited to businesses, developers and CPaaS providers, and dealers and partners; its call-center page also targets contact centers. · flowroute.com, 30 Sept 2026
- Licence
- The hosted Flowroute service is proprietary under terms granting a limited, non-transferable use licence, although its SDK libraries are open source. · flowroute.com, 15 Oct 2026
- Limit: messaging registration
- A G2 reviewer reported a 23-day delay in 10DLC registration that disabled business texting. · g2.com, 15 Oct 2026
- Limit: porting and outages
- Reviewers report call drops, network incidents and porting delays, including a migration that took more than three weeks. · g2.com, 15 Oct 2026
- Limit: support quality
- Multiple G2 and Capterra reviewers report slower or less effective support after ownership changes and during troubleshooting. · g2.com, 15 Oct 2026
- Limit: Trustpilot complaints
- Trustpilot reviewers report wrong call routing, spam labeling, duplicate card charges, unexplained cancellations and unanswered tickets. · trustpilot.com, 15 Oct 2026
- Messaging
- Its APIs support SMS and MMS, including customizable routing through webhooks and message detail records. · flowroute.com, 30 Sept 2026
- MMS
- MMS sends and receives image, video and audio content to North American text-enabled numbers. · flowroute.com, 15 Oct 2026
- Number management
- The Numbers API can search for and purchase US and Canadian numbers, manage inbound routes, and automate E911 and CNAM setup. · flowroute.com, 30 Sept 2026
- Ownership change
- BCM One announced acquisition of Flowroute assets from Intrado on March 9, 2022, with terms undisclosed. · flowroute.com, 15 Oct 2026
- Phone numbers
- Customers can buy or port local, toll-free and vanity numbers in the United States and Canada with caller ID, E911 and CNAM options. · flowroute.com, 15 Oct 2026
- Praise: pricing and setup
- G2 reviewers repeatedly praise competitive pricing, an easy portal, straightforward setup and simple PBX connections. · g2.com, 15 Oct 2026
- Praise: reliability
- Reviewers describe clear call quality, strong uptime and reliable DID routing when the service is operating normally. · g2.com, 15 Oct 2026
Where Flowroute stands on Freedom251
- SIP Trunking Providers#3 of 27