DOXA SUB 300
Finding alternatives to

DOXA SUB 300

Ref. sub-300-aquamarine

142 watches that match on case size, movement family, and price band. Sorted by how close the match is.

Case
42.5mm
Movement
Automatic
Category
Diver
MSRP
$2,890
Microbrand picks· 101

Independent makers covering the same brief — usually with something the mainstream brands don't.

HELM Khuraburi — alternative to DOXA SUB 300
HELM
Khuraburi
42mm · Automatic$310
Pro diver · Automatic
Marloe Watch Company Morar 310 — alternative to DOXA SUB 300
Marloe Watch Company
Morar 310
42mm · Automatic$697
Pro diver · Automatic
Borealis Watch Co. Caloura 300m — alternative to DOXA SUB 300
Borealis Watch Co.
Caloura 300m
42mm · Automatic$275
Pro diver · Automatic
Borealis Watch Co. Estoril 300 GMT — alternative to DOXA SUB 300
Borealis Watch Co.
Estoril 300 GMT
41.50mm · Automatic$600
Pro diver · Automatic
Borealis Watch Co. Jamanta — alternative to DOXA SUB 300
Borealis Watch Co.
Jamanta
42.50mm · Automatic$415
Pro diver · Automatic
Borealis Watch Co. Sea Storm MK2 — alternative to DOXA SUB 300
Borealis Watch Co.
Sea Storm MK2
41.50mm · Automatic$475
Pro diver · Automatic
Formex Reef 42 mm — alternative to DOXA SUB 300
Formex
Reef 42 mm
42mm · Automatic$2,414
Pro diver · Automatic
HELM Khuraburi Titanium — alternative to DOXA SUB 300
HELM
Khuraburi Titanium
42mm · Automatic$375
Pro diver · Automatic
Phoibos Great Wall — alternative to DOXA SUB 300
Phoibos
Great Wall
42mm · Automatic$465
Pro diver · Automatic
Phoibos Wave Master — alternative to DOXA SUB 300
Phoibos
Wave Master
42mm · Automatic$309
Pro diver · Automatic
Geckota Satin Reef Green — alternative to DOXA SUB 300
Geckota
Satin Reef Green
42mm · Automatic$349
Pro diver · Automatic
HELM Vanuatu — alternative to DOXA SUB 300
HELM
Vanuatu
42mm · Automatic$285
Pro diver · Automatic
Spinnaker Flying Dutchman — alternative to DOXA SUB 300
Spinnaker
Flying Dutchman
43mm · Automatic$445
Pro diver · Automatic
Spinnaker TIGER EYE — alternative to DOXA SUB 300
Spinnaker
TIGER EYE
42mm · Automatic$520
Pro diver · Automatic
Spinnaker Alligator Green — alternative to DOXA SUB 300
Spinnaker
Alligator Green
42mm · Automatic$375
Pro diver · Automatic
Spinnaker White Frost — alternative to DOXA SUB 300
Spinnaker
White Frost
43mm · Automatic$550
Pro diver · Automatic
Venezianico Nereide Bronzo — alternative to DOXA SUB 300
Venezianico
Nereide Bronzo
42mm · Automatic$1,250
Pro diver · Automatic
Venezianico Nereide Titanio — alternative to DOXA SUB 300
Venezianico
Nereide Titanio
42mm · Automatic$1,250
Pro diver · Automatic
Baltic Aquascaphe Titanium — alternative to DOXA SUB 300
Baltic
Aquascaphe Titanium
41mm · Automatic$788
Pro diver · Automatic
CWC 1980 RN Divers Automatic Re-Issue Watch — alternative to DOXA SUB 300
CWC
1980 RN Divers Automatic Re-Issue Watch
41mm · Automatic$2,458
Pro diver · Automatic
CWC Arctic Radar Automatic Diver Watch — alternative to DOXA SUB 300
CWC
Arctic Radar Automatic Diver Watch
41mm · Automatic$1,333
Pro diver · Automatic
CWC Automatic Divers Watch Mk.2 Black — alternative to DOXA SUB 300
CWC
Automatic Divers Watch Mk.2 Black
41mm · Automatic$1,249
Pro diver · Automatic
CWC Automatic Divers Watch Mk.2 Black with Date — alternative to DOXA SUB 300
CWC
Automatic Divers Watch Mk.2 Black with Date
41mm · Automatic$1,249
Pro diver · Automatic
Fortis Amber Orange — alternative to DOXA SUB 300
Fortis
Amber Orange
44mm · Automatic$5,120
Pro diver · Automatic
Fortis Black Resin — alternative to DOXA SUB 300
Fortis
Black Resin
44mm · Automatic$5,450
Pro diver · Automatic
HELM Vanuatu Titanium — alternative to DOXA SUB 300
HELM
Vanuatu Titanium
42mm · Automatic$350
Pro diver · Automatic
Zelos DLC - Blue Meteorite — alternative to DOXA SUB 300
Zelos
DLC - Blue Meteorite
43mm · Automatic$599
Pro diver · Automatic
Marloe Watch Company Sceptre — alternative to DOXA SUB 300
Marloe Watch Company
Sceptre
42mm · Automatic$507
Tool diver · Automatic
Marloe Watch Company Sceptre S2 — alternative to DOXA SUB 300
Marloe Watch Company
Sceptre S2
42mm · Automatic$507
Tool diver · Automatic
Phoibos Apollo Titanium — alternative to DOXA SUB 300
Phoibos
Apollo Titanium
41mm · Automatic$575
Pro diver · Automatic
Sternglas Marus — alternative to DOXA SUB 300
Sternglas
Marus
42mm · Automatic$485
Tool diver · Automatic
Yema Steel — alternative to DOXA SUB 300
Yema
Steel
43mm · Automatic$13,000
Pro diver · Automatic
Formex Reef 39.5 mm — alternative to DOXA SUB 300
Formex
Reef 39.5 mm
39.5mm · Automatic$2,230
Pro diver · Automatic
Fortis Amber Orange — alternative to DOXA SUB 300
Fortis
Amber Orange
40mm · Automatic$3,520
Pro diver · Automatic
Phoibos Depth Hunter — alternative to DOXA SUB 300
Phoibos
Depth Hunter
40mm · Automatic$470
Pro diver · Automatic
Venezianico Nereide Acquaforte — alternative to DOXA SUB 300
Venezianico
Nereide Acquaforte
42mm · Automatic$1,000
Tool diver · Automatic
Venezianico Nereide Ametista — alternative to DOXA SUB 300
Venezianico
Nereide Ametista
42mm · Automatic$1,250
Tool diver · Automatic
Yema Titanium — alternative to DOXA SUB 300
Yema
Titanium
43mm · Automatic$13,000
Pro diver · Automatic
Astor + Banks Tobacco — alternative to DOXA SUB 300
Astor + Banks
Tobacco
40mm · Automatic$1,149
Pro diver · Automatic
Monta Blue / Aluminum — alternative to DOXA SUB 300
Monta
Blue / Aluminum
40mm · Automatic$2,550
Pro diver · Automatic
Sternglas Marus 2.0 — alternative to DOXA SUB 300
Sternglas
Marus 2.0
41mm · Automatic$593
Tool diver · Automatic
Sternglas Merion — alternative to DOXA SUB 300
Sternglas
Merion
41mm · Automatic$701
Tool diver · Automatic
Zelos Hammered Grey — alternative to DOXA SUB 300
Zelos
Hammered Grey
44mm · Automatic$549
Pro diver · Automatic
Islander Islander Automatic Dive Watch with Bracelet, Double-Domed AR Sapphire Crystal, and Embossed Ceramic Bezel Insert #ISL-18 — alternative to DOXA SUB 300
Islander
Islander Automatic Dive Watch with Bracelet, Double-Domed AR Sapphire Crystal, and Embossed Ceramic Bezel Insert #ISL-18
43mm · Automatic$429
Tool diver · Automatic
Islander Islander Automatic GMT Dive Watch with Blue Waffle Dial #ISL-214 — alternative to DOXA SUB 300
Islander
Islander Automatic GMT Dive Watch with Blue Waffle Dial #ISL-214
42mm · Automatic$499
Tool diver · Automatic
Islander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 — alternative to DOXA SUB 300
Islander
Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301
45mm · Automatic$399
Pro diver · Automatic
Islander Islander Black Dial Automatic Dive Watch with DLC Case and Bracelet, AR Sapphire Crystal, and Luminous Ceramic Bezel Insert #ISL-34 — alternative to DOXA SUB 300
Islander
Islander Black Dial Automatic Dive Watch with DLC Case and Bracelet, AR Sapphire Crystal, and Luminous Ceramic Bezel Insert #ISL-34
43mm · Automatic$469
Tool diver · Automatic
Lum-Tec Marine 9 — alternative to DOXA SUB 300
Lum-Tec
Marine 9
39mm · Automatic$463
Pro diver · Automatic
Nodus Sector Deep — alternative to DOXA SUB 300
Nodus
Sector Deep
38mm · Automatic$650
Pro diver · Automatic
Nodus Sector Deep - DLC Destro — alternative to DOXA SUB 300
Nodus
Sector Deep - DLC Destro
38mm · Automatic$700
Pro diver · Automatic
Nodus Sector Deep Pioneer — alternative to DOXA SUB 300
Nodus
Sector Deep Pioneer
38mm · Automatic$675
Pro diver · Automatic
Zelos Ti - Red Tiger's Eye — alternative to DOXA SUB 300
Zelos
Ti - Red Tiger's Eye
44mm · Automatic$899
Pro diver · Automatic
Zelos Ti - Red Tiger's Eye — alternative to DOXA SUB 300
Zelos
Ti - Red Tiger's Eye
44mm · Automatic$559
Pro diver · Automatic
Oblvlo DM Skeleton Dive — alternative to DOXA SUB 300
Oblvlo
DM Skeleton Dive
40mm · Automatic$194
Tool diver · Automatic
Yema 39.5mm Automatic — alternative to DOXA SUB 300
Yema
39.5mm Automatic
39.5mm · Automatic$1,777
Pro diver · Automatic
Dryden Steel 12 Hour 41mm — alternative to DOXA SUB 300
Dryden
Steel 12 Hour 41mm
41mm · Automatic$650
Tool diver · Automatic
Henry Archer Yacht Blue — alternative to DOXA SUB 300
Henry Archer
Yacht Blue
42mm · Automatic$3,299
Tool diver · Automatic
Baltic Aquascaphe Classic — alternative to DOXA SUB 300
Baltic
Aquascaphe Classic
39mm · Automatic$648
Tool diver · Automatic
Baltic Aquascaphe Dual-Crown — alternative to DOXA SUB 300
Baltic
Aquascaphe Dual-Crown
39mm · Automatic$724
Tool diver · Automatic
Baltic Aquascaphe Dual-Crown - Black PVD — alternative to DOXA SUB 300
Baltic
Aquascaphe Dual-Crown - Black PVD
39mm · Automatic$724
Tool diver · Automatic
Yema Gilt Black — alternative to DOXA SUB 300
Yema
Gilt Black
39mm · Automatic$1,699
Pro diver · Automatic
Farer AQUA COMPRESSOR TITANIUM SERIES III — alternative to DOXA SUB 300
Farer
AQUA COMPRESSOR TITANIUM SERIES III
41.5mm · $1,350
Pro diver · Same size
Dan Henry Orange — alternative to DOXA SUB 300
Dan Henry
Orange
40mm · Automatic$310
Tool diver · Automatic
Galo Super200 — alternative to DOXA SUB 300
Galo
Super200
39mm · Automatic$488
Tool diver · Automatic
Galo Super200 Dark Edition — alternative to DOXA SUB 300
Galo
Super200 Dark Edition
39mm · Automatic$488
Tool diver · Automatic
Geckota Amber Bezel — alternative to DOXA SUB 300
Geckota
Amber Bezel
40mm · Automatic$349
Tool diver · Automatic
Helgray Poseidon Diver (Automatic) — alternative to DOXA SUB 300
Helgray
Poseidon Diver (Automatic)
40mm · $249
Pro diver · Sapphire
Henry Archer Moon Grey 40mm — alternative to DOXA SUB 300
Henry Archer
Moon Grey 40mm
40mm · Automatic$4,299
Tool diver · Automatic
Henry Archer Sylva — alternative to DOXA SUB 300
Henry Archer
Sylva
40mm · Automatic$4,999
Tool diver · Automatic
Henry Archer Icewake — alternative to DOXA SUB 300
Henry Archer
Icewake
40mm · Automatic$4,999
Tool diver · Automatic
Ikepod Seapod Bronze Archi — alternative to DOXA SUB 300
Ikepod
Seapod Bronze Archi
46mm · Automatic$2,808
Tool diver · Automatic
Ikepod Seapod S001 — alternative to DOXA SUB 300
Ikepod
Seapod S001
46mm · Automatic$1,458
Tool diver · Automatic
Ikepod Seapod S007 — alternative to DOXA SUB 300
Ikepod
Seapod S007
46mm · Automatic$1,458
Tool diver · Automatic
Monta Black — alternative to DOXA SUB 300
Monta
Black
40mm · Automatic$1,850
Tool diver · Automatic
Praesidus Patina — alternative to DOXA SUB 300
Praesidus
Patina
44mm · Automatic$550
Tool diver · Automatic
Geckota Ice White — alternative to DOXA SUB 300
Geckota
Ice White
38.5mm · Automatic$375
Tool diver · Automatic
Ikepod Seapod S003 — alternative to DOXA SUB 300
Ikepod
Seapod S003
46mm · Automatic$1,566
Tool diver · Automatic
KUOE SOMBRERO 90-011 — alternative to DOXA SUB 300
KUOE
SOMBRERO 90-011
38mm · Automatic$980
Tool diver · Automatic
Lorier Standard — alternative to DOXA SUB 300
Lorier
Standard
39mm · Automatic$699
Tool diver · Automatic
Lorier Standard — alternative to DOXA SUB 300
Lorier
Standard
39mm · Automatic$699
Tool diver · Automatic
Lorier Skyward — alternative to DOXA SUB 300
Lorier
Skyward
39mm · Automatic$599
Tool diver · Automatic
Lorier Standard — alternative to DOXA SUB 300
Lorier
Standard
39mm · Automatic$599
Tool diver · Automatic
Lum-Tec Date — alternative to DOXA SUB 300
Lum-Tec
Date
44mm · Automatic$999
Tool diver · Automatic
Maen SHW.01 — alternative to DOXA SUB 300
Maen
SHW.01
38mm · Automatic$503
Pro diver · Automatic
Maen M1.1.5 — alternative to DOXA SUB 300
Maen
M1.1.5
38mm · Automatic$719
Pro diver · Automatic
Vaer Black — alternative to DOXA SUB 300
Vaer
Black
39mm · Automatic$679
Tool diver · Automatic
Vaer Standard — alternative to DOXA SUB 300
Vaer
Standard
39mm · Automatic$699
Tool diver · Automatic
Hemel Gallant USAF Edition — alternative to DOXA SUB 300
Hemel
Gallant USAF Edition
40mm · Automatic$300
Tool diver · Automatic
Wolbrook Black "Tropic" Rubber Strap 40mm — alternative to DOXA SUB 300
Wolbrook
Black "Tropic" Rubber Strap 40mm
40mm · Automatic$579
Tool diver · Automatic
Wolbrook Black "Tropic" Rubber Strap — alternative to DOXA SUB 300
Wolbrook
Black "Tropic" Rubber Strap
40mm · Automatic$539
Tool diver · Automatic
Halios Sunburst Blue — alternative to DOXA SUB 300
Halios
Sunburst Blue
40mm · Automatic$765
Tool diver · Automatic
Vaer Anacapa — alternative to DOXA SUB 300
Vaer
Anacapa
39mm · Automatic$699
Tool diver · Automatic
William Wood Standard — alternative to DOXA SUB 300
William Wood
Standard
41mm · Automatic$1,495
Automatic · Similar size
Christopher Ward C65 Super Compressor Elite — alternative to DOXA SUB 300
Christopher Ward
C65 Super Compressor Elite
40mm · Automatic$1,995
Automatic · Sapphire
William Wood Standard — alternative to DOXA SUB 300
William Wood
Standard
41mm · Automatic$995
Automatic · Similar size
William Wood Standard — alternative to DOXA SUB 300
William Wood
Standard
41mm · Automatic$995
Automatic · Similar size
William Wood Standard — alternative to DOXA SUB 300
William Wood
Standard
41mm · Automatic$895
Automatic · Similar size
Praesidus Blue Tropic Rubber 38mm — alternative to DOXA SUB 300
Praesidus
Blue Tropic Rubber 38mm
38mm · Automatic$645
Tool diver · Automatic
Farer AQUAMATIC — alternative to DOXA SUB 300
Farer
AQUAMATIC
38.5mm · $875
Tool diver · Diver-grade WR
Cincinnati Watch Company Desk Diver Professional Dive Watch Black & Orange — alternative to DOXA SUB 300
Cincinnati Watch Company
Desk Diver Professional Dive Watch Black & Orange
38mm · Manual$750
Tool diver · Sapphire
Wolbrook Black "Topic" Rubber Strap — alternative to DOXA SUB 300
Wolbrook
Black "Topic" Rubber Strap
38mm · Automatic$549
Tool diver · Automatic
Steps up from here· 4

Where the same idea goes when budget isn't the constraint.

Grand Seiko SBGH289 — alternative to DOXA SUB 300
Grand Seiko
SBGH289
43.8mm · Automatic$7,700
Tool diver · Automatic
Grand Seiko SBGJ237 — alternative to DOXA SUB 300
Grand Seiko
SBGJ237
44.2mm · Automatic$7,600
Tool diver · Automatic
Grand Seiko SBGE253 — alternative to DOXA SUB 300
Grand Seiko
SBGE253
40.5mm · Spring Drive$6,900
Tool diver · Similar size
Grand Seiko SBGE277 — alternative to DOXA SUB 300
Grand Seiko
SBGE277
44mm · Spring Drive$6,800
Tool diver · Similar size
In the same price band· 18

Comparable watches at roughly the same money. Often the deciding click for a new buyer.

DOXA SUB 300 Carbon — alternative to DOXA SUB 300
DOXA
SUB 300 Carbon
42.5mm · Automatic$4,390
Shared caliber (COSC Chronometer) · Same family (SUB)
DOXA SUB 200 C-GRAPH II — alternative to DOXA SUB 300
DOXA
SUB 200 C-GRAPH II
42mm · Automatic$2,890
Same family (SUB) · Tool diver
DOXA SUB 300T — alternative to DOXA SUB 300
DOXA
SUB 300T
42.5mm · $2,190
Same family (SUB) · Pro diver
Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — alternative to DOXA SUB 300
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
42.6mm · Automatic$3,600
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — alternative to DOXA SUB 300
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
42.6mm · Automatic$2,900
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition — alternative to DOXA SUB 300
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
42.6mm · Automatic$3,900
Pro diver · Automatic
Seiko Prospex Sea 1968 Heritage Diver's GMT Watch — alternative to DOXA SUB 300
Seiko
Prospex Sea 1968 Heritage Diver's GMT Watch
42mm · Automatic$1,700
Pro diver · Automatic
Bremont Black 43mm — alternative to DOXA SUB 300
Bremont
Black 43mm
43mm · Automatic$5,100
Pro diver · Automatic
DOXA SUB 200 II — alternative to DOXA SUB 300
DOXA
SUB 200 II
44mm · Automatic$1,750
Same family (SUB) · Tool diver
Longines LEGEND DIVER 59 — alternative to DOXA SUB 300
Longines
LEGEND DIVER 59
42mm · Automatic$4,100
Pro diver · Automatic
Bremont Black 43mm — alternative to DOXA SUB 300
Bremont
Black 43mm
43mm · Automatic$4,700
Pro diver · Automatic
Marathon Arctic White on Rubber Strap — alternative to DOXA SUB 300
Marathon
Arctic White on Rubber Strap
41mm · Automatic$1,800
Pro diver · Automatic
Marathon Anthracite Black — alternative to DOXA SUB 300
Marathon
Anthracite Black
41mm · Automatic$2,100
Pro diver · Automatic
Marathon OD Green — alternative to DOXA SUB 300
Marathon
OD Green
41mm · Automatic$2,100
Pro diver · Automatic
Marathon OD Green — alternative to DOXA SUB 300
Marathon
OD Green
41mm · Automatic$1,650
Pro diver · Automatic
Bremont RNLI Orange — alternative to DOXA SUB 300
Bremont
RNLI Orange
40mm · Automatic$3,795
Pro diver · Automatic
Bremont Blue / Green 40mm — alternative to DOXA SUB 300
Bremont
Blue / Green 40mm
40mm · Automatic$3,900
Pro diver · Automatic
Longines LEGEND DIVER — alternative to DOXA SUB 300
Longines
LEGEND DIVER
39mm · Automatic$3,850
Pro diver · Automatic
Cheaper alternatives· 13

If the price is the only thing keeping you off this watch, these get you most of the way there for less.

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — alternative to DOXA SUB 300
Seiko
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
42.7mm · Automatic$1,350
Pro diver · Automatic
Seiko Prospex Sea — alternative to DOXA SUB 300
Seiko
Prospex Sea
43.8mm · Automatic$625
Pro diver · Automatic
Seiko Prospex Sea — alternative to DOXA SUB 300
Seiko
Prospex Sea
41.7mm · Automatic$595
Pro diver · Automatic
Seiko Monster — alternative to DOXA SUB 300
Seiko
Monster
42.4mm · Automatic$550
Pro diver · Automatic
DOXA SUB 200 — alternative to DOXA SUB 300
DOXA
SUB 200
42mm · $1,290
Same family (SUB) · Tool diver
Citizen Promaster Diver Automatic — alternative to DOXA SUB 300
Citizen
Promaster Diver Automatic
44mm · Automatic$469
Pro diver · Automatic
Citizen Promaster Fujitsubo — alternative to DOXA SUB 300
Citizen
Promaster Fujitsubo
41mm · Automatic$1,195
Pro diver · Automatic
Tissot Seastar 1000 — alternative to DOXA SUB 300
Tissot
Seastar 1000
40mm · Automatic$875
Pro diver · Automatic
Tissot Seastar Wilson WNBA — alternative to DOXA SUB 300
Tissot
Seastar Wilson WNBA
40mm · Automatic$875
Pro diver · Automatic
Tissot Seastar 1000 Powermatic 80 GMT — alternative to DOXA SUB 300
Tissot
Seastar 1000 Powermatic 80 GMT
46mm · Automatic$1,375
Pro diver · Automatic
Tissot Seastar 2000 — alternative to DOXA SUB 300
Tissot
Seastar 2000
46mm · Automatic$1,275
Pro diver · Automatic
Marathon Arctic White on Rubber Strap — alternative to DOXA SUB 300
Marathon
Arctic White on Rubber Strap
36mm · Automatic$1,200
Pro diver · Automatic
Marathon Black on Rubber Strap — alternative to DOXA SUB 300
Marathon
Black on Rubber Strap
36mm · Automatic$1,200
Pro diver · Automatic
Direct homages· 6

Watches that wear the same design language — close enough that a stranger might confuse them across the room.

Pagani Design PD-1719 — alternative to DOXA SUB 300
Pagani Design
PD-1719
42.5mm · Automatic$154
Pro diver · Automatic
Seiko Prospex Sea — alternative to DOXA SUB 300
Seiko
Prospex Sea
42mm · Automatic0
Pro diver · Automatic
DOXA SUB 200 T.GRAPH — alternative to DOXA SUB 300
DOXA
SUB 200 T.GRAPH
43mm · Automatic0
Same family (SUB) · Tool diver
Pagani Design PD-1695 — alternative to DOXA SUB 300
Pagani Design
PD-1695
45mm · Automatic$145
Pro diver · Automatic
Pagani Design PD-1685 — alternative to DOXA SUB 300
Pagani Design
PD-1685
42mm · Automatic$171
Tool diver · Automatic
Pagani Design PD-1702 — alternative to DOXA SUB 300
Pagani Design
PD-1702
42mm · Automatic$132
Tool diver · Automatic
← Back to the DOXA SUB 300Open the alternatives engine