ThousandEyes has raised $5.5 million in Series A funding from Sequoia and other Silicon Valley angel investors.

In another development, the company emerged from stealth on Wednesday and launched a product that provides visibility into the performance of cloud applications. ThousandEyes customers include members of the Fortune 500, Equinix, Evernote, Priceline, ServiceNow, Twitter, Zendesk and Zynga, says the company.

ThousandEyes provides IT performance management for cloud offerings. The company is based in San Franscisco, California.