Synchronizing Files and Folders

Cloudiness

Dropbox-Sync

2023-01-20

Dropsync: Autosync for Dropbox (4.7@39,319) Ǥ 19 3 / Dropsync PRO Key (4.7@5,393; ~EUR 7.00) Ǥ 1 $Contains no trackers known to us \o/$
Dropbox: Cloud Speicherplatz (4.3@2,225,709) Ǥ 25 5
Sync & Comparison using Dropbo (4@23) Ǥ 7 1 LastUpdate: 2020-03-06
Sync & Comparison - Drive, Dro (2.3@356) Ǥ 10 2 LastUpdate: 2020-03-06 Google Drive, Dropbox and OneDrive

Sync with Mega

2023-01-20

Autosync for MEGA - MegaSync (4.6@3,985) Ǥ 19 3

Sync with Box

2023-01-24

Box (4.4@204,091) Ǥ 25 5
Autosync for Box - BoxSync (4.4@1,215) Ǥ 19 3

Sync with Google Drive

2023-01-24

Autosync for Google Drive (4.8@42,729) Ǥ 19 4
Google Drive (4.1@9,619,394) Ǥ 33 1
Drive Syncrypt (4@90) Ǥ 12 1 LastUpdate: 2018-03-15 with optional encryption (AES 256)
Gallery Drive Sync (3.9@2,279) Ǥ 12 3 LastUpdate: 2017-06-13
GDriveSync (3.5@928) Ǥ 14 3 LastUpdate: 2018-03-11 / GDriveSync Pro (4.8@72; ~EUR 1.50) Ǥ 12 1 LastUpdate: 2017-02-08
Remote File Manager (3.3@288) Ǥ 7 2
Sync & Comparison - Drive, Dro (2.3@356) Ǥ 10 2 LastUpdate: 2020-03-06 Google Drive, Dropbox and OneDrive

Various Cloud Syncers

2023-01-20

JioCloud - Your Cloud Storage (5@100,512) Ǥ 35 7
Files.fm cloud storage and bac (5@401) Ǥ 15 4 Files.fm
Cloudike (5@60) Ǥ 25 8
spryCloud (5@14) Ǥ 24 $Contains no trackers known to us \o/$ LastUpdate: 2020-01-17
OneSync: Autosync for OneDrive (4.8@15,037) Ǥ 20 3
PhotoSync – Transfer Photos (4.7@15,991) Ǥ 23 4 LastUpdate: 2021-06-15 / PhotoSync Bundle Add-On (4.8@3,432; ~EUR 4.00) 0 $Contains no trackers known to us \o/$ between phones, tablets and computers/NAS; instantly, on WiFi, or on a specified location
Yandex Disk—file cloud storage (4.6@428,375) Ǥ 32 3 Wikipedia (EN)
Microsoft OneDrive (4.5@4,051,956) Ǥ 29 3
pCloud: Cloud Storage (4.4@61,876) Ǥ 15 5
GMX Cloud (4.4@8,445) Ǥ 17 2
Cozy Drive (4.4@1,063) 7 $Contains no trackers known to us \o/$ cloud storage or self-hosted
SanDisk Memory Zone (4.3@143,101) Ǥ 27 9 SugarSync, Box, Picasa, Dropbox, Google Docs, SkyDrive, Facebook (FAQ)
Copy (4.2@16,908) Ǥ 10 LastUpdate: 2016-01-20
CloudMAX (4.2@5,153) Ǥ 23 4
Degoo: 20 GB Cloud Storage (4.1@824,371) Ǥ 22 10
4Sync (4.1@24,109) Ǥ 28 7
Tresorit (4@4,218) 9 $Contains no trackers known to us \o/$ Vorstellung 3/2020
BucketAnywhere for S3 (4@281) Ǥ 8 1 LastUpdate: 2020-05-30 / BucketAnywherePro for S3 (4.7@50; ~EUR 4.75) Ǥ 8 $Contains no trackers known to us \o/$ LastUpdate: 2020-05-20
MediaFire (3.8@103,410) 8 7
luckycloud (3.8@34) 13 $Contains no trackers known to us \o/$ Vorstellung 3/2020
IDrive Online Backup (3.7@12,187) Ǥ 25 8
Synchronize Ultimate (3.6@2,941) Ǥ 16 3 LastUpdate: 2020-02-18 synchronize from, to and between different clouds
Fiabee (3.6@1,021) 5 $Contains no trackers known to us \o/$ LastUpdate: 2017-03-26
Upvise - CRM Jobs Forms (3.5@279) Ǥ 17 1 Almost an Office-Suite for small businesses
SugarSync (3.2@16,557) Ǥ 16 2

Sync with your own Cloud

Synchronisation with support for multiple protocols

2023-01-23

FolderSync (4.5@30,827) Ǥ 21 3 / FolderSync Pro (4.5@24,223; ~EUR 6.50) 19 1 FTP, FTPS, SFTP, Samba, WebDAV, Dropbox, Amazon S3, SkyDrive, SugarSync, Ubuntu One, Box.net, LiveDrive, HiDrive, NetDocuments, … Pro with Tasker support
AndFTP (your FTP client) (3.5@31,222) Ǥ 10 1 / AndFTPPro (3.9@1,045; ~EUR 4.75) 1 $Contains no trackers known to us \o/$ LastUpdate: 2014-08-10 FTP, FTPS; Pro only: SCP, SFTP
Titanium Media Sync (2.5@1,732; ~EUR 3.25) Ǥ 9 $Contains no trackers known to us \o/$ LastUpdate: 2017-06-30 FTP, SFTP, FTPS, Dropbox
SyncTool (0@0) 8 $Contains no trackers known to us \o/$ LastUpdate: 2018-09-06 Github; FTP, ownCloud/Nextcloud

Synchronisation via Samba (aka SMB aka "Windows-Shares")

2023-01-20

Sweet Home WiFi Picture Backup (4.3@2,466) 8 $Contains no trackers known to us \o/$ LastUpdate: 2020-02-26 Vorstellung 4/2017 | 3/2018; Camera photos/videos only?
SMBSync2 (4.1@2,481) 11 $Contains no trackers known to us \o/$ LastUpdate: 2021-07-11 Github; Anleitung 11/2017
SyncMe Wireless (3.4@5,564) Ǥ 10 1 LastUpdate: 2018-10-01
AndSMB (samba client) (3.4@5,335) 7 1 LastUpdate: 2020-04-16 / AndSMBPro (3.4@143; ~EUR 4.75) 0 $Contains no trackers known to us \o/$ LastUpdate: 2020-04-14

Synchronisation via SSH

2023-01-23

Rsync (3.5@77) 5 2 LastUpdate: 2020-11-28
myRSync (Beta) (0@0) 10 $Contains no trackers known to us \o/$ LastUpdate: 2020-01-13
Rsync for Tasker (0@0) 7 $Contains no trackers known to us \o/$ Github
Syncopoli (0@0) 11 $Contains no trackers known to us \o/$ GitLab; rsync client

Synchronisation via FTP

2023-01-20

AndFTP (your FTP client) (3.5@31,222) Ǥ 10 1 / AndFTPPro (3.9@1,045; ~EUR 4.75) 1 $Contains no trackers known to us \o/$ LastUpdate: 2014-08-10 FTP, FTPS; Pro only: SCP, SFTP

Synchronisation with own Desktop/Server components

2023-01-20

Cozy Drive (4.4@1,063) 7 $Contains no trackers known to us \o/$ cloud storage or self-hosted
Tonido File Access Share Sync (4.3@4,188) 6 1 LastUpdate: 2020-04-09 requires Desktop component; available from homepage for Linux, Mac, Windows, Raspi
ownCloud (4.1@12,906) 17 $Contains no trackers known to us \o/$ Github
Unison (4@37) 2 $Contains no trackers known to us \o/$ LastUpdate: 2019-06-09 requires root
GoodSync (3.9@734) Ǥ 14 2
Cirrus for owncloud (3.8@500) 14 $Contains no trackers known to us \o/$ LastUpdate: 2016-10-13 Github
Seafile (3.5@1,769) 13 $Contains no trackers known to us \o/$ Github
Pydio (3.5@798) 6 $Contains no trackers known to us \o/$
Nextcloud (3@9,275) Ǥ 27 $Contains no trackers known to us \o/$ / Nextcloud dev (5@2) 26 $Contains no trackers known to us \o/$ Github; Kurzvorstellung 8/2016; how to auto-sync

Peer2Peer

2023-01-27

Syncthing-Fork (4.7@437) 19 $Contains no trackers known to us \o/$ Github
Syncthing (4.6@5,634) 15 $Contains no trackers known to us \o/$ Github; cross platform, i.e. also Windows, Mac and Linux; PC Setup Video 9/2016 | 1/2019; Video how Syncthing works 6/2018; Anleitung 2/2021
Resilio Sync (3.8@5,188) Ǥ 15 4
Syncthing Lite (3.7@55) 1 $Contains no trackers known to us \o/$ LastUpdate: 2019-01-13
Rsync Server (0@0) 7 $Contains no trackers known to us \o/$ Github
Wormhole (0@0) 4 $Contains no trackers known to us \o/$ LastUpdate: 2021-04-05 Github
SyncMemories (0@0) 3 LastUpdate: 2020-05-13 Github; local via USB; focus on photos
git-annex: cross-platform

Further Readings:

The 20 Best File Sync and Cloud Storage Apps for Android (11/2020 - 4/2022)
6 Best Open source Personal Cloud Software to Setup Cloud storage (5/2020 - 9/2020)
Sichere Cloud-Dienste: Alternativen zu Google Drive und Dropbox (5/2020)
Android-Apps ersetzen: Cloud-Dienst (3/2020 - 12/2021)
Best Cloud Storage (6/2019 - 6/2022)
Top 20 Best Cloud Storage and File Sync Apps for Android, iPhone and iPad (5/2019)
Best cloud storage (1/2019 - 2/2022)
The 5 Best File Syncing Apps (11/2018 - 8/2021)

2023-02-04

IzzyOnDroid