interpspire - SERP Analysis

https://www.interspire.com/

https://www.capterra.com/p/268676/Interspire-Email-Marketer/

https://www.linkedin.com/company/interspire

https://www.softwareadvice.com/email-marketing/interspire-email-marketer-profile/

https://www.smtp2go.com/setupguide/interspire-email-marketer/

https://www.crunchbase.com/organization/interspire

https://knowledge.smtp.com/s/article/Interspire-Email-Marketer-Mail-Setup

https://slashdot.org/software/p/Interspire/

https://www.emailvendorselection.com/emailvendors/interspire/

https://sourceforge.net/software/product/Interspire/