blakev / list-of-tech-migrations

list of public tech migrations

List of Tech Migrations

list of public tech migrations (create a PR to if you have correction or addition), originally from this blog

note:

• migration can be partial (not whole stack, since most companies out there not using single programming language/database anyway)
• year = year of the article/presentation, or the year of migration if stated on the article/presentation.
• discuss here: reddit thread / ycombinator discussion

2005

• Reddit (2005) from CommonLISP to Python

2010

• Bing (2010) from C++ to DotNET

2011

• Twitter (2011) from Ruby to Scala
• UrbanAirship (2011) from MongoDB to PostgreSQL
• Mixpanel (2011) from Erlang to Python

2012

• LinkedIn (2012) from Ruby to NodeJS
• MoovWeb (2012) from ? to Golang
• NTPPool (2012) from Perl to Golang
• DLGoogle (2012) from C++ to Golang
• Bitly (2012) from Python/C to Golang
• SoundCloud (2012) from Ruby to Golang
• SmartyStreets (2012) from .NET to Golang
• Toggl (2012) from Ruby to Golang
• Shareaholic (2012) from MongoDB to Riak
• DigiDoc (2012) from MongoDB to PostgreSQL
• Etsy (2012) from MongoDB to MySQL
• TekPub (2012) from MongoDB to PostgreSQL
• TargeterApp (2012) from NodeJS to Ruby

2013

• PayPal (2013) from Java to NodeJS
• Koding (2013) from NodeJS to Golang
• Iron.io (2013) from Ruby to Golang
• Zalora (2013) from PHP to Golang
• TimeHop (2013) from Ruby to Golang
• CanonicalJuju (2013) from Python to Golang

2014

• Instill (2014) from AngularDart to Polymer
• Workia (2014) from ActionScript to Dart
• TrustWave (2014) from ActionScript/Flex to Dart
• Facebook Chat (2014) from Erlang to C++
• Grab (2014) from Ruby/NodeJS to Golang
• CloudFlare (2014) from PostgreSQL to CitusDB

2015

• Auth0 (2015) from Apache Kafka to ZeroMQ
• Pinterest (2015) from Java to Elixir
• PresidentUniversity (2015) from PHP/MySQL to Golang/PostgreSQL
• UserLike (2015) from MySQL/MongoDB to PostgreSQL
• Olery (2015) from MongoDB to PostgreSQL
• CrowdStrike (2015) from Scala to Golang
• DockYard (2015) from Ruby to Elixir

2016

• CrowdStrike (2016) from Scala to Golang
• Tokopedia (2016) from Perl to Golang
• Uber (2016) from PostgreSQL to MySQL
• Uber (2016) from NodeJS to Golang/Java
• Uber (2016) from Python to Golang
• Digg (2016) from NodeJS to Golang
• Google AdWords (2016) from GWT to Angular/Dart

2017

• BleacherReport (2017) from Ruby to Elixir
• UpGuard (2017) from JRuby to Golang
• Movio (2017) from Scala to Golang
• Discord (2017) from MongoDB to Cassandra
• Uber (2017) Riak/Solr to Cassandra
• Swat.io (2017) from MySQL to PostgreSQL
• Poki (2017) from PHP to Golang
• Stream (2017) from Python to Golang
• Baidu (2017) from MySQL to CockroachDB
• Boxzilla (2017) from PHP to Golang
• GAEA (2017, 2019) from MySQL to TiDB
• Shippable (2017) from MongoDB to PostgreSQL
• GeekyAnts (2017) from ReactNative to Flutter
• Yuanfudao (2017) from MySQL to TiDB

2018

• AppTree (2018) from Java/Kotlin/ObjC/Swift to Dart
• SendGrid (2018) from Perl/Python to Golang
• Bukalapak (2018) from Ruby/MySQL to Golang/MongoDB/ElasticSearch/CloudSQL
• Centrifugo (2018) from Python to Golang
• TheGuardian (2018) from MongoDB to PostgreSQL
• CloudFlare (2018) from CitusDB to ClickHouse
• Github (2018) from jQuery to vanilla javascript
• Meituan (2018) from MySQL to TiDB
• iQiyi (2018) from MySQL to TiDB
• Yiguo (2018) from Hadoop/MSSQLServer to TiDB
• Mobike (2018) from MySQL to TiDB
• CashApp (2018) from MySQL to Vitess
• Bing (2018) from DotNET to DotNetCore

2019

• AppsFlyer (2019) from Clojure to Golang
• Deliveroo (2019) from Ruby to Rust
• Amazon (2019) from Oracle to AuroraPostgres/DynamoDB
• 2FintechGiants (2019) from Oracle to CockroachDB
• Codism (2019) from Python to Golang
• Comcast (2019) from Cassandra to ScyllaDB
• Zhihu (2019) from MySQL to TiDB
• JDCloud (2019) from MySQL to TiDB
• NetEaseGames (2019) from MySQL to TiDB
• Xiaomi (2019) from MySQL to TiDB
• BookMyShow (2019) from MSSQLServer to TiDB
• Trivago (2019) from Kubernetes to Nomad
• Narvar (2019) from DynamoDB/PostgreSQL-RDS to YugabyteDB
• PlumeDesignsInc (2019) from MongoDB to YugabyteDB
• SkyElectric (2019) from MySQL/MongoDB/NodeJS to PostgreSQL/ElasticSearch/ScyllaDB/Elixir

2020

• Discord (2020) from Golang to Rust
• HSBC (2020) from DB2 to MongoDB
• UnnamedUSWirelessCarrier (2020) from Oracle to PostgreSQL
• ListenBrainz (2020) from InfluxDB to TimescaleDB
• Dropbox (2020) from Nginx to Envoy
• Repustate (2020) from Python to Golang
• SimilarWeb (2020) from NodeJS to Golang
• PayPal (2020) from C++ to Golang
• Discord (2020) from Cassandra to ScyllaDB
• UnnamedCompany (2020) from React to Svelte
• PalFish (2020) from MongoDB to TiDB
• Shopee (2020) from MySQL to TiDB
• WeBank (2020) from MySQL to TiDB
• ChinaTelecomBestpay (2020) from Oracle to TiDB
• U-Next (2020) from MySQL to TiDB
• ZTOExpress (2020) from OracleExadata to TiDB
• Xiaohongshu (2020) from MySQL to TiDB
• BankOfBeijing (2020) from ? to TiDB
• BankOfChina (2020) from MySQL to TiDB
• ZhuanZhuan (2020) from MySQL to TiDB
• BIGO (2020) from MySQL to TiDB
• VNG/ZaloPay (2020) from MySQL to TiDB
• VIPKid (2020) from MySQL to TiDB
• Kroger (2020) from PostgreSQL to YugabyteDB
• Censys (2020) from PostgreSQL to YugabyteDB
• Justuno (2020) from MSSQLServer/Cassandra to YugabyteDB
• Xignite blog (2020) from MSSQLServer-RDS to YugabyteDB
• Voiceland (2020) from PostgreSQL/MSSQLServer to YugabyteDB
• Jutsuno (2020) from Cassandra/Neo4j/MSSQLServer/CockroachDB to YugabyteDB
• Manetu (2020) from Cassandra? to YugabyteDB
• BRIKL (2020) from DynamoDB to YugabyteDB/Hasura
• StadiaMaps (2020) from CockroachDB to ScyllaDB
• Roblox (2020) from Windows to Linux/Nomad

2021

• KhanAcademy (2021) from Python to Golang
• ownCloud (2021) from PHP to Golang
• Percona (2021) from Prometheus to VictoriaMetrics
• Aluma (2021) from C# to Golang
• Olery (2021) from MongoDB to PostgreSQL
• NitroKey (2021) Ubuntu Core to Debian
• Slack (2021) HAProxy to Envoy
• Github (2021) Ruby to Golang
• GumGum (2021) from Cassandra to ScyllaDB
• SvelteKit (2021) from RollUp/SnowPack to Vite
• ReplIt (2021) from WebPack to Vite
• GitPod (2021) from React/Gatsby to SvelteKit
• NinjaVan (2021) from MySQL to TiDB
• Meituan (2021) from MySQL to TiDB
• AutoHome (2021) from MSSQLServer to TiDB
• 58.com (2021) from MySQL to TiDB
• Chehaoduo (2021) from MySQL to TiDB
• KunLun (2021) from MySQL to TiDB
• GiG (2021) from RedShift to ClickHouse
• Brex (2021) from Elixir to Kotlin
• Storj (2021) from Python to Golang
• CoinBase (2021) from Native to ReactNative
• Archive.org (2021) from Kubernetes to Nomad/Consul
• Koyeb (2021) from Kubernetes to Nomad/Firecracker/Kuma
• AccelByte (2021) from Kubernetes to Nomad/Consul
• Expedia (2021) from Cassandra to ScyllaDB
• Grab (2021) from Cassandra to ScyllaDB