I got 37k rank in COMEDK 2018. Will I get CS here and is it worth it?

No, REVA University is not Tier 1 but comes in the category of Tier 2. Tier 1 usually includes institutes like IITs and NITs. But REVA University is one of the top private institutes that is known for its education and amazing placements. 

Yes, REVA University is good for placements. Along with preparing students for the placement, the university invites top companies to hire its students. The the highest package for Reva University placements 2026 was INR 56 LPA. Bosch, Kyndryl, the happiest Minds, DXC Technology,

I don't think it is worth joining Reva University for Btech in ISE through comedk. There are better colleges and better courses available in btech through comedk, try for those courses. If you are getting this college and course based on your rank, if this is the best available option at your rank,

REVA University admissions are done on the basis of entrance exams. The entrance exams accepted by the university include CAT, MAT, REVA CET, REVA MAT, JEE Mains, COMDEK etc. 

REVA University is a bit costly but still less expensive than other private universities. It is known to give affordable and good quality education at a reasonable fees. The fees for REVA University courses is between INR 1 Lacs to INR 7 lakhs.