On the malecón along the Pano river in the middle of Tena, describing itself as one of the oldest and safest agencies in the region — a claim worth testing by asking how long the guide in your boat has been running the Jatunyacu.
Rafting, kayaking, caves and jungle walks, which is the standard Tena list. What varies between agencies here is guide experience and equipment age, not itinerary.
Their WhatsApp is behind a wa.link short link rather than printed, so it is easy to miss on the page; it resolves to the first of the two mobiles they publish.