1-VoIP vs VoIPstudio

1-VoIP

Figure	1-VoIP	VoIPstudio
Price from	$4.95/mo	$6/mo
Free plan	—	—
Free trial	—	Yes
Open source	—	—
Web	Yes	—
Windows	Yes	Yes
macOS	Yes	Yes
Linux	Yes	Yes
iOS	Yes	Yes
Android	Yes	Yes
Plans published	10	4
Spec score · Business Phone Systems	7.8 (#123)	9.0 (#12)
Auto attendant	Yes	Yes
Business numbers	multiple	multiple
Call routing	custom	custom
Desktop and mobile apps	Yes	Yes
Free plan	No	No
Headquarters	The privacy policy lists the company address as 80 East 5th St, Suite 200, Edmond, Oklahoma 73034.	London, United Kingdom
Product	1-VoIP provides residential and business VoIP phone service and SIP trunking.	VoIPstudio describes itself as a business phone system and scalable call center for business communications.
Security	The privacy policy says site data exchanges use SSL encryption and digital signatures and that the site complies with PCI vulnerability standards.	Its security policy describes AES-256 storage encryption, TLS-encrypted SIP signalling, ZRTP-encrypted voice streams, and ISO 27001-certified data centres.
Support	The company advertises 24/7 support and 100% US-based support staff.	Phone and live chat support are available Monday–Friday, 08:00–23:00 UTC, and the pricing page says plans include 24/7 multilingual support.

1-VoIP has no write-up on Specifiction yet; its figures are above.

VoIPstudio has no write-up on Specifiction yet; its figures are above.