ESP-IDF
Espressif keeps five ESP-IDF branches alive and tells you almost nothing in the release notes.
Comparison · DevOps
GraphHopper vs Erlang/OTP
A side-by-side editorial comparison of GraphHopper and Erlang/OTP — release velocity, themes, recent moves, and the top alternatives to consider.
GraphHopper vs Erlang/OTP: at a glance
What is GraphHopper?
GraphHopper finished moving vehicle profiles into custom models, then went back to OSM tags.
GraphHopper ships a major roughly every six months, with 11.0 in October 2025 the most recent. The architectural work happened in 9.0, which moved vehicle encoded values into the custom model, removed the built-in vehicle parsers' name property and the wheelchair parsers, allowed external encoded values in custom models, and blocked built-in custom model filenames. 10.0 then spent itself on storage layout — byte-based edge storage, a Map-based KVStorage API, wider georef fields — and 11.0 is almost entirely OSM tag interpretation: maxspeed=none handling, separate foot and bike road access, cycleway oneway combinations, toll parsing moved into a country-aware parser.
What is Erlang/OTP?
Three OTP branches move as one release train, and SSH and epmd carry the security load.
Erlang/OTP is patching three branches in lockstep — 29 as current, 28 and 27 as maintenance — with each fix set published as a trio within minutes of itself. The window is dominated by security work in the network-facing applications: OTP 29.0.4 carried six CVEs including an epmd denial-of-service mitigation, and the 4 August trio brought SSH into line with RFC 4253 by rejecting packets not aligned to the cipher block size, with a timing-safe packet-discard path for CBC ciphers. A regression in the previous patch that stopped epmd binding to localhost was fixed in the same trio.
GraphHopper vs Erlang/OTP: editorial side-by-side
GraphHopper
0.0DEVOPS
GraphHopper finished moving vehicle profiles into custom models, then went back to OSM tags.
◆ Current state
GraphHopper ships a major roughly every six months, with 11.0 in October 2025 the most recent. The architectural work happened in 9.0, which moved vehicle encoded values into the custom model, removed the built-in vehicle parsers' name property and the wheelchair parsers, allowed external encoded values in custom models, and blocked built-in custom model filenames. 10.0 then spent itself on storage layout — byte-based edge storage, a Map-based KVStorage API, wider georef fields — and 11.0 is almost entirely OSM tag interpretation: maxspeed=none handling, separate foot and bike road access, cycleway oneway combinations, toll parsing moved into a country-aware parser.
◆ Where it's heading
The configuration model is settled and the effort has moved to routing quality. Nearly every change in 11.0 is about reading OSM tags more faithfully for a specific mode — bicycle handling on living streets, foot instructions at junctions, MTB speeds on compacted surfaces, HGV tolls by country — which is the long tail of work that separates a routing engine that runs from one people trust. Turn restrictions are the recurring source of real bugs, appearing across 9.0, 10.0, 10.1 and 11.0 with via-way handling repeatedly needing correction. The new POST /navigate endpoint accepting a GraphHopper request is the one API-surface addition in this window.
◆ Prediction
Expect continued profile-level tuning driven by OSM tagging edge cases rather than architectural change, since three consecutive majors have narrowed in that direction. Turn restriction handling with multiple or overlapping via-ways is the most likely source of the next bugfix release, given its record across every version here.
Erlang/OTP
5.0DEVOPS
Three OTP branches move as one release train, and SSH and epmd carry the security load.
◆ Current state
Erlang/OTP is patching three branches in lockstep — 29 as current, 28 and 27 as maintenance — with each fix set published as a trio within minutes of itself. The window is dominated by security work in the network-facing applications: OTP 29.0.4 carried six CVEs including an epmd denial-of-service mitigation, and the 4 August trio brought SSH into line with RFC 4253 by rejecting packets not aligned to the cipher block size, with a timing-safe packet-discard path for CBC ciphers. A regression in the previous patch that stopped epmd binding to localhost was fixed in the same trio.
◆ Where it's heading
The maintenance pattern is unusually strict: 27, 28 and 29 receive the same trouble reports on the same day, so the effective support window is wide and sites on older majors are not being pushed forward by security pressure. Where the fixes land is consistent — ssh, ssl, crypto, public_key and erts account for nearly every changed application across these releases, which is the distribution epmd and the TLS/SSH stack impose on a distributed runtime. The CBC timing mitigation in particular is an old class of attack being closed properly rather than papered over.
◆ Prediction
Expect the next patch trio to follow the same shape — a small set of trouble reports applied to all three branches simultaneously — with ssh and ssl the most likely applications to change. Nothing in these entries indicates feature work landing on the patch branches; that stays on the next major.
Alternatives to GraphHopper and Erlang/OTP
Other DevOps products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either GraphHopper or Erlang/OTP.
Apache Seata
Seata's first Apache release is stuck in a voting round, two years after its last shipped version.
Apollo Config
Apollo is grinding down the operational cost of running a config service.
Dapr
Dapr patches three release lines at once and writes root-cause notes for each fix.
Apache bRPC
Apache bRPC keeps widening what it can talk to and what it can run on.
OpenTripPlanner
OpenTripPlanner finished a multi-year migration by deleting its REST API.
See all GraphHopper alternatives → · See all Erlang/OTP alternatives →
Recent activity from GraphHopper and Erlang/OTP
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoErlang/OTPSSH now rejects misaligned packets with a timing-safe discard
- 5d agoErlang/OTPOTP 28 takes the same SSH alignment and epmd fixes
- 5d agoErlang/OTPOTP 27 receives the same erts and ssh patches
- 12d agoErlang/OTP27 July patch touches crypto, ssl, ssh and public_key on OTP 28
- 12d agoErlang/OTPOTP 27 mirrors the 27 July crypto and transport patch
- 13d agoErlang/OTPOTP 29.0.4 carries six CVEs and an epmd DoS mitigation
- 9mo agoGraphHopper11.0 refines mode-specific OSM tag handling and adds POST /navigate
- 1y agoGraphHopper10.2 fixes an import failure on recent OSM turn restriction data
- 1y agoGraphHopper10.1 cherry-picks a via-way turn restriction fix
- 1y agoGraphHopper10.0 reworks edge storage layout and turn cost computation
- 2y agoGraphHopper9.1 is a bugfix release with no documented changes
- 2y agoGraphHopperVehicle profiles collapse into custom models in GraphHopper 9 ⚡
Frequently asked questions
What is the difference between GraphHopper and Erlang/OTP?
They serve adjacent needs but don't currently overlap on shipped themes. Erlang/OTP is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is GraphHopper better than Erlang/OTP?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Erlang/OTP is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to GraphHopper?
Top GraphHopper alternatives in DevOps are ranked by recent ship velocity. Browse the "GraphHopper alternatives" section above for the current picks, or visit /alternatives/graphhopper for the full list with editorial commentary on each.
What are the best alternatives to Erlang/OTP?
Top Erlang/OTP alternatives in DevOps are ranked by recent ship velocity. Browse the "Erlang/OTP alternatives" section above for the current picks, or visit /alternatives/erlang-otp for the full list with editorial commentary on each.