RRDtool vs UnitDB

RRDtool

5.0 #34 in Time-Series Databases

About RRDtool

UnitDB

6.7 #13 in Time-Series Databases

About UnitDB
RRDtoolUnitDB
Free planNoNo
Free trialNoNo
Paid from——
Open sourceNoNo
PlatformsWindows, Linuxapi, self-hosted
Free planYes—
Deploymentself_hostedself_hosted
Retention policiesYesYes
Ingestion methodscommand line; standard-input pipes; Perl; Python; Ruby; Lua; TclPut/PutEntry API, batch operations, uTP PUBLISH messages
Horizontal scaling—Yes

Both are listed in Best Time-Series Databases. On Inferse, UnitDB scores higher on our published basis.