Shares of Twilio Inc TWLO dipped notably lower towards the end of Tuesday's trading session after reports surfaced that Amazon.com, Inc. AMZN Pinpoint and its two-way messaging capability could enter the market and compete against Twilio. A Twilio spokesperson responded to the report and told Benzinga, "This builds on the relationship we have had with them for some time powering SNS." Read moreTWLO: Probably some more upside is still posible. $TWLO, Twilio Inc. / D