Can Sendgrid help me send individual, customized emails?

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Can Sendgrid be used as a back-end for a web-app's customer action- or lifecycle-related emails that need to be sent individually (not in campaigns or as lists)?

Such as:
- Emailing potential customers a few days after they've started, but abandoned, signup. We use an moderated-invitation model so we'd like to follow up with people who don't make it into the system.
- Emailing customers a day after they've made their first purchase with followup info and feedback.

There's only a handful of 'types' of emails, but each one needs to be sent to a single recipient and with varying amounts of customized content.

Is Sendgrid a good choice for us?