HEATKEYS

Position	Website	Change	Thumbnail
1	twilio.com - Twilio Cloud Communications - APIs for Voice, VoIP and Text Messaging Twilio lets you use standard web languages to build voice, VoIP and SMS applications via a web API. Build the next generation of communications with us.	0
2	plivo.com - Plivo Cloud | Web and Telephony Unified! Plivo - Web meets Telephony	0
3	telapi.com - TelAPI - Build Apps With Our Cloud based SMS & Voice API meta_description	0
4	nexmo.com - Nexmo - API to push SMS at wholesale rates Nexmo is a simple API to push SMS at wholesale rates with high deliverability. Reach over 4 billion mobiles in more than 200 countries.	0
5	tropo.com - Tropo - Cloud API for Voice, SMS, and Instant Messaging Services description	0
6	techcrunch.com - TechCrunch	5
7	programmableweb.com - ProgrammableWeb - Mashups, APIs, and the Web as Platform ProgrammableWeb.com keeps you up to date with web mashups and APIs: what	0
8	apivoice.com - Home @ API Voice	-2
9	stackoverflow.com - Stack Overflow	-1
10	voicechatapi.com	0
11	developer.att.com - Home	0
12	en.wikipedia.org - Wikipedia, the free encyclopedia	14
13	developer.zendesk.com - Zendesk Developers Open-Source Work by the Zendesk Engineering Team	0
14	github.com - Secure source code hosting and collaborative development - GitHub	-1

I have no idea. Please, refresh tomorrow ;)

Site	Traffic	Engagement
twilio.com	75.8%	0x
google.com	7.6%	0x
microsoft.com	3.5%	0x
wikipedia.org	3.3%	0x
apivoice.com	2.7%	0x
Other	7.1%	0x

Top Advertisers for voice api

Site
call-em-all.com
cdyne.com
ifbyphone.com
twilio.com
buttontel.com